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Posted by JumpCrisscross 4/14/2025

There are two types of dishwasher people(www.theatlantic.com)
115 points | 344 comments
WarOnPrivacy 4/14/2025|
https://archive.is/ZkQJA
TehShrike 4/17/2025||
My mental model for diswashers got a lot better after watching some Technology Connections: https://youtu.be/jHP942Livy0
relwin 4/17/2025||
Best advice from TC: verify the water is hot before starting the dishwasher. Especially if your water heater is located a ways from your kitchen and the pipes aren't well insulated.
robocat 4/17/2025|||
Cold water only connection for all dishwashers I've seen in New Zealand. Dishwashers have an internal heating element.

Are modern US dishwashers plumbed into hot water?

NZ has 240 Volts (10 Amp 2400 Watt appliances are normal - anything above that needs special wiring). And NZ environmental regulations might be involved too (modern washing machines can be crappy because they try to skimp on water usage - our regulations can be overkill).

cryptonector 4/18/2025|||
> Are modern US dishwashers plumbed into hot water?

Yes.

gertlex 4/17/2025||||
It is unsurprising that it varies by country, etc. Below is pure speculation while eating a snack:

Likely dishwashers for the NZ market are designed to actually spend sufficient time heating the water.

My impression from watching the TC videos a while ago is that at least in the US, (many) dishwashers probably only do a insufficient time interval of adding more heat to the water.

It makes sense that different markets developed different ways; the brands that optimize for the local trends (cold vs hot water) can skimp on some features and have lower costs.

zeristor 4/18/2025||||
The plumber recommended not using hot water from the boiler, since it takes so long for the hot water to start coming through it wasn’t worth it.
cryptonector 4/18/2025|||
I have a hot water recirculator for this. The price I pay is that instead of waiting for hot water at the kitchen sink I've to wait for cold water, as the hot water is recirculated through the cold water pipes.
snypher 4/18/2025||
I have seen a return loop on the hot side, but not returning through the cold side. Do you have more info on this? (I do wonder if recirculating hot through a pipe next to a cold pipe would result in heating the cold)
cryptonector 4/18/2025||
The thing consists of a) a pump that goes on the output of the water heater, and b) wax-based valves that go between the hot and the cold under each sink where you want hot water without having to wait a long time. The valves turn on when the water on the hot side cools, and they close when it gets hot. The pump stops when the valves and hot faucets are all closed, and it has a timer for scheduling hours of operation. I believe it's this:

  https://aurorixs.shop/product/watts-500800-instant-water-recirculating-pump-system-with-built-in-timer
leoedin 4/18/2025|||
So you’re always pumping hot water through your pipes? Does that not end up wasting quite a bit of energy? I guess in winter it’s not a big problem since you’re heating your house anyway, but presumably in summer it is just adding unwanted heat?
cryptonector 4/18/2025|||
In the winter, as you note, it's not much of a waste, and it helps keep the pipes from freezing.

In the summer... this is central Texas, so the sun helps keep the water in the pipes hot, so I imagine that the pump is on less often than in the winter. I've not checked though. My gas bills are not out of the ordinary, so I think it's not a ridiculous waste.

gosub100 4/22/2025|||
4 day old post but these can have timers so they only run for one time window such as when you wake up.
happymellon 4/18/2025|||
That sounds like a great way to get Legionnaire's, unless I'm missing something.
mrbigbob 4/19/2025|||
actually its quite the opposite. because the hot water is constantly recirculating its hard for the bacteria to grow. Kind of like why they say never drink from stagnant water but water that is flowing is safer (not neccessarily safe to be clear)
tgaj 4/19/2025||||
I think all apartment buildings have recirculators so somehow it works.
cryptonector 4/18/2025|||
I've been doing it for 15 years. No legionella here.
zaphirplane 4/18/2025|||
I have to ask, showers?
BeetleB 4/17/2025||||
Yes - over the last decade or so they removed the heating element in most US dishwashers. So they either are connected to the hot water line, or have a mechanism to heat the water (or both).
enragedcacti 4/17/2025|||
I could be wrong but I'm pretty sure that even today almost all US dishwashers have some mechanism to heat the water, just maybe not the giant exposed element in the bottom like older ones. Water out of the tap is going to be on the low end of usable dish-washing temps at the very beginning of a cycle, let alone 45+ minutes later.

The reason cold or luke-warm water is a problem is that the programs are extremely simple and just assume the input is 110-120f and won't stall the cycle for waiting for the target temp.

johnwalkr 4/17/2025||
I forgot about the exposed element. These days most plastic spatulas withstand high temperature. Back in the day I think every North American family had at least one yellow spatula destroyed by the element.
vel0city 4/18/2025|||
My dishwasher doesn't have a big exposed heating element in the pan but it still has a water heater to it. It still gets the water very hot even if I start it without getting the hot water flowing first.
netsharc 4/17/2025|||
Is it still possible to plumb hot water into such dishwashers? Then the heating element have less work...
gertlex 4/17/2025||
I bet some manufacturers don't even use temperature sensors in many models, and just assume an approximate incoming water temperature, and heat for a fixed time period according to calculations on amount of water in the system. This guess comes from the impression that cheap temperature sensing circuitry isn't the most reliable long-term.
flowerthoughts 4/18/2025|||
How did you conclude that they aren't the most reliable long-term?

Temperature sensing is extremely simple and cheap. Bi-metal contacts have been used since the dawn of electronics, and the solid state versions are also really simple. (Making components that are temperature invariant is the hard task.)

gertlex 4/21/2025||
Fair question! My speculation here comes from thermistors being relatively common replacement parts. (clothes dryers, ovens) As you mentioned, temperature-invariant is tricky, and I think it's often a non-linear but close-enough for the design. I have the impression a failure mode can be if the temperature-response behavior changes over time.

A bi-metal contact is only good for a single temperature, I think? (can be adjustable like thermostats) (I'm sure many but not all dish-washers probably do only need a single temperature...)

robocat 4/18/2025||||
I bet you're wrong. Is there a website where we can make an adjudicated bet JUST against each other. How many dishwashers come without a hot-wash option? Any dishwasher that didn't heat water enough would struggle with hard fats.

My dishwasher has a scalding 75°C option.

protolyticmind 4/18/2025|||
If true, that is a recipe for a lawsuit if it went wrong.
neilfrndes 4/17/2025||||
For me, moving away from pods to a dishwasher liquid (cascade 3x from Costco) made the most difference. I add some liquid in the prewash and some in the main compartment. I had to figure out the right amount to add in each via trial and error. I don't pre rinse or run the hot water beforehand, my dishes come out clean.
Loughla 4/17/2025|||
We had to switch from pods to liquid because the pods make way too many suds, so the emergency float shut off was getting stuck.

Source; that time I replaced my fucking dishwasher because I couldn't figure out why it kept leaking so much everywhere.

al_borland 4/18/2025||
I had the opposite problem. I used the gel and the dishwasher wouldn’t completely drain. I had someone out to look at it and they couldn’t figure out what was wrong. I tried a pod as a last ditch effort and it worked.

I’ve since moved and use the powder with my current one, as recommended by Technology Connections, and have had good luck.

nonchalantsui 4/17/2025||||
I'm surprised you made the switch to liquid and not to powder. It's so much cheaper and not as fussy as liquid. That plus a tiny bottle of rinse aid that lasts forever winds up giving me the cleanest dishes.
neilfrndes 4/18/2025||
I tried using powder as well, but the dishes weren't coming out as clean. I will give powder another shot when my current liquid runs out
rblatz 4/18/2025|||
We use pods, don’t mess with pre-rinse, dishes come out clean. Don’t worry about water temp. We do use jet dry otherwise the dishes come out wet.
ac29 4/17/2025||||
I wonder how much this really matters. For me my dishwasher is far enough from the hot water heater that it generally takes several gallons for the water to run hot. But the wash cycle is 2+ hours long and uses very minimal water (~3 gallons/cycle). Even if I preheated the lines using the tap near the washer, it wouldnt even be lukewarm by the end of the wash cycle.
lolinder 4/17/2025|||
I recently moved into a home where the previous tenants told us they didn't use the dishwasher because it didn't actually clean the dishes. Having seen TC, I checked the kitchen tap and sure enough it behaved like yours: it took a good 60 seconds to get hot.

We started using the dishwasher on day 1 with TC's pre-heated water tip and have yet to have a single problem with the dishwasher.

rainsford 4/17/2025||||
I think the most crucial factor is that the initial pre-rinse cycle is usually relatively short, so pre-heating the water means that cycle is done with hot water. My dishwasher at least starts out rinsing for maybe 15-20 minutes before draining and refilling the tub. I also think there is likely some effect in that the main cleaning cycle will at least start out with hot tap water.
ThrowawayTestr 4/17/2025||||
My dishes have gotten a lot cleaner since I started running the tap.
moshegramovsky 4/17/2025||
Trying this tonight.
ThrowawayTestr 4/18/2025||
How'd it go?
moshegramovsky 4/18/2025||
It worked much better. The silverware were perfect. Usually there are a few that need to be hand-washed.
ThrowawayTestr 4/18/2025||
Awesome, spread the word!
moshegramovsky 4/21/2025||
I told everyone in my family! Even my parents.
DiggyJohnson 4/17/2025||||
The first cycle in the wash is where the hot water makes the biggest difference.
nucleardog 4/18/2025||||
> I wonder how much this really matters. For me my dishwasher is far enough from the hot water heater that it generally takes several gallons for the water to run hot.

(I'll preface this with: If your dishes are coming out clean and you're happy with them, then keep on keeping on. The reason there's a lot of discussion around this is because there are a lot of people who _aren't_ getting clean dishes out of their dishwasher.)

If you listen to your dishwasher's cycles, you'll probably hear it do a relatively short initial rinse to get off the bulk of the gunk, then the main wash, then another rinse. (Maybe multiple washes/rinses, but that's the general pattern.)

The idea is to make that first rinse most effective. Anything that can be taken off in the pre-wash cycle is something that won't be washed off in the main wash and cycled over the dishes over and over.

As people normally use their dishwasher, that cycle is being done with cold to lukewarm water and no soap. Most people wouldn't see a oily plate with dried-on sauce on it and think to clean it by spraying it in the sink with cold water until it were clean. But that's what the dishwasher's doing to their dishes.

Hence the suggestion of running the hot water tap first. It's a very easy thing to do to ensure the dishwasher's using hot water in that initial rinse and everyone generally accepts that hot water's going to dissolve and rinse off the food and oils better.

Another very easy improvement is adding a bit of soap to the basin. Most dishwashers only have a single compartment for soap and it's released during the main wash. If you throw a squirt/scoop of detergent into the basin before you start it, that will get mixed in to the pre-wash cycle.

The cycle's happening anyway, using hot water and soap is just making the most of it!

Anecdotally (like all these other comments), my wife's approach is definitely the "racoon on meth" archetype--throw the dishes wherever they could fit, throw one of those detergent pods in, hit "start", close it, wait a few hours, then take all the dishes out and dump water out of cups and bowls and handwash them because they're still filthy. When I was building the kitchen, she was questioning the expense and effort of the dishwasher because in her entire life she's never had one that actually cleaned the dishes properly and thought they were kind of pointless.

Since I didn't want to spend the next however many years hearing about how the dishwasher sucks, after we put it in I played dishwasher czar for a month. I loaded the dishes properly, put in the proper amount of soap (and a sprinkle in the basin), made sure the rinse aid wasn't empty, ran the tap first, ran the dishwasher. Every single load came out spotless. She'd often question something I was putting in because "there's no way it's going to get that off". It did. Every time.

Wife satisfied that the dishwasher is good and having had a month of instruction I unleashed the meth-y racoon on it, and we're back to the dishwasher being a really elaborate rinsing machine we use before handwashing the dishes.

Is it just the running the tap? Probably not. Just like it's not _just_ the adding soap to the basin, using the rinse aid, loading them properly, etc. They all contribute to "using the dishwasher most effectively".

milesrout 4/17/2025|||
2+ hours long??? Surely you're exaggerating
bruckie 4/17/2025|||
A lot of newer dishwashers have longer cycles to reduce water usage (and I presume get government environmental certifications like EPA Energy Star?). More soak time means less water needed.

My dishwasher's "normal" cycle is 3 hours, but it has a quick cycle that runs in an hour and does about as good of a job with marginally higher water and energy use. We mostly use the quick cycle.

vrosas 4/18/2025||
Mine (Bosch 500 series) has a super long drying cycle, what feels like 30+ minutes after it's done washing.
bombela 4/17/2025||||
My generic GE dishwasher defaults to a few hours, it feels closer to 4h than 2h. There is also an overnight mode that seems to take almost 8h. And then a quick wash mode that takes 1h.
dboreham 4/18/2025|||
2.5h here.
BrandoElFollito 4/18/2025||||
There are no dishwashers in Europe that can be connected to hit water. I had no idea that this is a thing somewhere.

Are US washing machines connected to hot water as well?

tgaj 4/19/2025|||
That's no true - many european dishwashers can be connected to cold or to hot water. I have a Siemens one that has this option.
BrandoElFollito 4/19/2025||
Oh, really? I cannot say that I've tried them all, but the maybe 6 or 7 I had (mine or part of a rental) had only cold water connections.
tgaj 4/21/2025||
There is only one water connection but sometimes it can be connected to hot water instead of cold.
BreakingProd 4/19/2025|||
Yes! US washing machines have dual water intakes: one for cold and one for hot.
gwbas1c 4/17/2025||||
The best way to do that... Pre-rinse!!!
lolinder 4/17/2025|||
Pre-rinsing uses way more water than is typically necessary just to get the water hot, especially given that to be an effective pre-rinse you're going to want the water to be hot already before you even start.
gwbas1c 4/18/2025||
You don't rinse everything! There's always a few items that need an extra squirt before they go in. (Like pots and pans.) By the time those few items have an extra squirt, the water in the pipes is hot enough to start the dishwasher.
BeetleB 4/17/2025||||
Don't. I used to do it till I read an article telling me not to do that.

Remove solid gunk. Load dishwasher. Make sure you have Rinse-aid in the dishwasher. Run. Done. Comes out clean.

OutOfHere 4/17/2025||
Rinse aids are toxic substances that will harm your stomach.
dole 4/17/2025|||
previous hn article and discussion: “Gut epithelial barrier damage caused by dishwasher detergents and rinse aids (sciencedirect.com)”

https://news.ycombinator.com/item?id=38275060

AStonesThrow 4/17/2025||||
All restaurants and food service facilities use “rinse agents” or “drying agents”; they simply never have the time or capacity to air-dry dishes and silverware, so eff whatever the training courses tell us to do, from the County Department of Public Health. Just slather everything with chemicals and make sure nobody can smell them from the dining room or taste it on a spoon.

And yes they’re toxic. Of course they are! Next, let us coat all surfaces with antimicrobial toxins, starting with everything in the hospital, and your infant’s diaper-changing stations, and your stapler at work.

It will be just like Nethack, where you open a spellbook to read it, but it is “coated with contact poison!” so I hope your Unicorn Horn is available.

nonchalantsui 4/17/2025|||
There is no research that states such. Most online articles are referencing a study done on professional dishwashers, in which they complete their task within 2 minutes and some rinse aid was still found on the dishes.

Home dishwashers, the ones that take 4 hours on average, are not going to result in the same thing. Claiming such would be like claiming you won't use dish soap since technically it can still be left on your dishes when quickly washed.

OutOfHere 4/18/2025|||
There is absolutely no need for rinse aids if you already wash the utensils with water before putting the in the dishwasher. This is good practice.

I guess we have wildly different levels of risk tolerance. I even use an extra rinse cycle. You will understand only after have gastrointestinal trouble. Speaking of which, have you had a colonoscopy lately?

BeetleB 4/18/2025|||
> Home dishwashers, the ones that take 4 hours on average

I've never had one that took 4 hours. The most is about 2.5 hours.

dingaling 4/17/2025|||
If you're going to spend time doing that, why not just wash the dishes by hand anyway?
gwbas1c 4/18/2025||
That takes significantly longer and uses significantly more water.
ludicrousdispla 4/17/2025||||
I can't recall ever using a dishwasher that had a connection to the hot water line.
crazygringo 4/17/2025||
I've never had one that wasn't connected to the hot water line.

If you've got both available, I can't see any reason why you'd choose to hook it up to cold. That just means it takes longer for your dishwasher to heat up.

johnwalkr 4/17/2025|||
Well both are not always available. In many countries, there is no hot water tank/line. There are only inline heaters or very small tanks locally where needed (each bathroom and kitchen sink). Then, you buy appliances such as dishwashers and clothes washers that also have inline heaters built-in (and you don't need to think about this, in such a region, this is the default thing that is sold).

It doesn't necessarily take longer to heat up, they are pretty much instant since they are designed to heat as needed locally as needed (don't need to heat a large volume of water) and they are at least as fast to provide hot water as a central hot water tank. They can be gas or electric powered depending on what is available/cheaper in the region and you never run out of hot water with an inline heater.

Even if you do have a central hot water tank, it's possible that heating water locally at the dishwasher is faster depending on distance to the tank. Anecdotally, I used to wait for hot water in the kitchen when I lived in Canada and I no longer do in Europe where I have no central hot water tank. In North America, recent high end home kitchens feature a local inline heater for hot water at the kitchen sink even though a central hot water tank exists.

leoedin 4/18/2025||
Everyone in the uk has a central hot water heater, and nobody has a hot-water plumbed dishwasher. Presumably the 230V supply is enough to heat the water up quickly.

Do you also have hot water plumbed washing machines?

crazygringo 4/18/2025||
In the US, yes washing machines are generally connected to both hot and cold water. Unlike dishwashers which need to get even hotter than hot water, washing machines generally don't have any internal heating element at all.
rlpb 4/18/2025||||
If it takes x gallons for your hot water to run through, and your dishwasher only consumes <x gallons before stopping long enough for your hot water line to cool again, then connecting your dishwasher to your hot water line would both waste hot water and never get any.
BrandoElFollito 4/18/2025|||
Our dishwashers in Europe must be connected to cold water (I just checked a manual)
spiffyk 4/17/2025|||
Not sure why you were downvoted. This sounds like absolutely crucial advice for people in countries where dishwashers don't heat the water on their own. I've never seen one like that in my life, but yeah, sounds important.
gwbas1c 4/17/2025||
When the dishwasher has to heat the water, it's slower than from the water heater.

That's because heating water from the 120 volt circuit that the dishwasher runs on is slow. (At least in North America, 240 volt countries might not have this issue.)

jchw 4/18/2025|||
I know this is common knowledge now, but just for people who might not realize it: a typical North American NEMA 5-15R receptacle will indeed deliver 120V 15A electricity, but the electrical grid is split-phase 240V. Right across from my dish washer is an electric range; most of these require 240V 30A or 50A receptacles (I think mine is 30A, but I could be mis-remembering.) So it's not like we couldn't have higher power dishwasher, but if you already have central water heating it's kind of senseless to heat the water at the dishwasher.
gwbas1c 4/21/2025||
> electrical grid is split-phase 240V

The electric grid is three phase; 60 or 50 hz depending on where you are in the world. The voltage varies considerably, long distance transmission is in the kilovolts, or higher.

"split-phase 240V" happens at the transformer near your house, in North America. I don't know as much about the rest of the world, but I've always understood it to be ~440v split phase because it allows longer wires between the transformer and the house.

jchw 4/21/2025||
Yes of course, but obviously when it comes to household dishwashers those parts of the grid are not terribly important and I think we already exceeded the pedantry budget enough.

> "split-phase 240V" happens at the transformer near your house, in North America. I don't know as much about the rest of the world, but I've always understood it to be ~440v split phase because it allows longer wires between the transformer and the house.

Where I live, we have three phase 480/277V for commercial. I believe that is standard in North America, but I'm not really sure.

gwbas1c 4/21/2025||
One of the reasons for the NACS switch is because light poles are ~270 volts, and NACS supports that voltage.
spiffyk 4/18/2025||||
Ah, I forgot about North America being 120 V, that would indeed explain it. IIRC that's also why electric kettles are not really a thing there while being ubiquitous where I live.
vel0city 4/18/2025|||
Most people I know have an electric kettle here in the US. Every office I've been to has had one in the break room. Anyone who drinks tea or eats a lot of ramen or drinks anything but drip coffee will have a kettle.

It's really more that historically Americans have been fine with drip style coffee makers instead of drinking pour overs or tea.

Aloisius 4/18/2025||||
I think that has more to do with Americans not drinking a lot of hot tea.

I had an instant 195 F (90.5 C) faucet in my previous kitchen which worked well for the rare times I made tea. Worked fine with a 120V circuit.

BrandoElFollito 4/18/2025||
This is popular in the Netherlands (the only country in Europe where I saw this)
gwbas1c 4/21/2025|||
They're becoming more popular as word gets out. Stovetop tea kettles used to be popular.
reaperducer 4/17/2025|||
(At least in North America, 240 volt countries might not have this issue.)

Central America, parts of South America, Japan, and Taiwan are also ~110 volt.

https://en.wikipedia.org/wiki/Mains_electricity_by_country#/...

cush 4/17/2025|||
I feel like the two types of dishwasher people are clearly delineated by those who have and have not watched the Technology Connections videos on dishwashers.

1. Powdered detergent people who sprinkle some soap in for the prewash

2. Tab people who attest that they need to pre-rinse their dishes before they put them in the dishwasher

conradludgate 4/17/2025|||
How about a third :)

I've seen the technology connections video, continue to use pods, and continue not to pre-rinse the dishes

from-nibly 4/17/2025|||
There are two types of PEOPLE, there's lots of different animals /jk
code_biologist 4/17/2025|||
Many types... I've seen the Technology Connections video and use whatever, mostly liquid detergent. After running a few experiments and coming away unimpressed, I've kept on pre-rinsing.
rainsford 4/17/2025||||
I've seen the video and tried switching from pods (which I assume is the same thing as a tab, just never heard that name before) to powder with some power in the prewash compartment without prerinsing the dishes.

Other's results may vary, but I found my dishwasher would eventually get clogged with the TC approach, even though I clean the filter regularly and wasn't putting in dishes with absurd amounts of food still on them. Since I switched back to pods and prerinsing, the clogging went away. Maybe my dishwasher or the install has something goofy about it, but it was definitely a failed experiment for me. Although I still think the TC argument is a solid one in theory.

mystified5016 4/17/2025|||
Some brands like Cascade produce solid compressed powder tablets. Same general concept as the pods, just no fluid load or pouch
BrandoElFollito 4/18/2025|||
Pod is with liquid, tab is with compresse powder.
al_borland 4/18/2025||||
Dishwasher companies have tried for a long time to get people to stop pre-washing their dishes before putting them in the dishwasher. I remember ads from the 80s or 90s with people putting full cakes, or a baked on lasagna pan into the dishwasher and it coming out clean.

Almost everyone I know still does excessive rinsing in the sink first. I have never done this and it’s always been fine.

I learned some things from the TC videos, but it was more about refining things, it didn’t drastically change what I was already doing.

touristtam 4/18/2025||
And you have no residual food in the filter to clean out on a very short and regular basis? You do clean the filter out, don't you?
vel0city 4/18/2025|||
I had a GE Profile dishwasher from the 2000's when I moved into my current home. It was abused by the previous owner and sold as not working. I completely rebuilt it and it worked great for a while until it's logic board died and replacements were hard or expensive to source.

But that thing had a powerful masticator. It would slurry up almost any foods. There was a very coarse filter about half the diameter of the drain hose but outside of that there was never anything left in the pan.

It would also monitor the turbidity to determine if it needed to flush the current pan water and add fresh water. It had a soap dispenser so it could re-add soap if needed. That thing was an incredible dishwasher. I still miss it.

BrandoElFollito 4/18/2025||
A masticator is what I am missing in a dishwasher. We do not have that in Europe (not the faucet electrical thing that mixes and destroys organic dtuff you put in the faucet - this is forbidden)
lunaticlabs 4/20/2025||
Not anymore! These are allowed at least in the UK and in Germany (where I reside) now. It was not the case when I first moved here a few years ago, but read about how they're within code now. The problem I have is that they're not actually available anywhere that I've seen, and I doubt I'll find a plumber easily who will install one.
BrandoElFollito 4/20/2025||
They are still forbidden in France, and not because of the code.

This is because the sanitizing stations are not ready for this kind of mash - they expect cleaner water + oil + larger particles. What they get instead is a substance that kills the bacteria in charge of the sanitization.

vel0city 4/21/2025||
Do y'all also not have in-sink macerators?
BrandoElFollito 4/21/2025||
No, this is what we were discussing (it started with the device in a dishwasher (that one I have never seen) and then moved to the ein-sink one (that I saw when in the US and in horror movies)
yesco 4/18/2025||||
For most of the article I felt like the author's learnings were pretty obvious, particularly in regards to the water jet direction and the minimum necessary dish arrangement. They didn't even get into detail about the heat and steam.

Then they mentioned the part about dishwashers having a "filter", and in that moment, my heart was instantly filled with shock, horror, anxiety, and finally, resignation.

I apparently live in a world where dishwashers have filters.

I'm afraid to look, but I'm pretty sure mine probably does as well, in fact I think I've seen it with my own eyes, yet somehow it never registered. Oh no.

kiwijamo 4/18/2025|||
I clean out our dishwasher filter every few months and I've never seen any residual food get caught by the filter. As long as you scape off the food bits it's fine. It'd getting to the point where I'm checking the filter less and less often.
bradfa 4/17/2025||||
I’m a Bosch dishwasher powder soap with some in the bottom for presoak but still pre-rinse type person. Clean the filter once a month (takes 2 minutes literally) use jet dry (or equivalent) and I have zero complaints about how my 20 year old dishwasher performs!
vondur 4/17/2025||
I too have a Bosch dishwasher and use powdered soap. I also add in some citric acid to help with the really hard water we have in my area. I pre-rinse everything though.
morsch 4/18/2025||
If it's a Bosch, it's probably got a salt compartment and a way to configure it for the water hardness.
nly 4/17/2025|||
Pods work fine without prerinsing
chewbacha 4/17/2025|||
You know, the hot water tip is great, but cleaning the filter is really the best thing I’ve found to keeping it working well. Residue always seems to indicate a dirty filter.
lolinder 4/17/2025||
I think it depends on the kind of residue. If we're just talking about caked-on stuff that you recognize that didn't wash off, I'd start with hot water and adding the pre-wash powder. But if you get stuff on your dishes that you don't recognize... yeah, that's a filter.

I once stayed with family at a vacation rental where the dishwasher left things worse than we put them in—a thick gray residue plastered over everything. We were going to be there for a week with 30 people, which meant we had a lot of dishwashing to do, but by the time I became aware of it the rest of the family had already given up on it and had started washing dishes by hand.

I took one look at the output and knew immediately what was wrong thanks to TC. An hour later (it was that bad) the dishwasher was working flawlessly and we saved hours in dishwashing time over the week.

(We also told the rental owners that their cleaners weren't taking care of the dishwasher. I didn't ask for them to pay me for the time, but I probably should have!)

chewbacha 4/17/2025||
I’m mostly referring to my own dishwasher which I use all the time and understand. But for a long time I never cleaned the filter and then one day I did and suddenly everything made sense.

The filter can also clog up and a layer of water will form above it which can impede the rotation of the sprayers and then it really doesn’t work well.

hinkley 4/17/2025|||
I can't decide if it would be cool to live next door to him or if I'd never get anything done ever again.
shellfishgene 4/18/2025|||
Note that European dishwashers are quite different in a few aspects.
mjamesaustin 4/17/2025||
Welp, thank you for that. About to use my dishwasher for the first time since childhood.
dfxm12 4/17/2025||
I used to be uptight about how to load the dishwater until I put away a load that was packed by my partner, "like a raccoon on meth", and noticed there wasn't a difference in the cleanliness.

Now I just worry about buying new bowls. Will the bowls fit nicely given pitch and angle of the of the dealies on the rack? The bowls I inherited from my grandmother fit so nicely in any dishwasher I've loaded them into, but now they're starting to crack...

spiffytech 4/17/2025||
Some things won't matter, some will. I think it's changed over time as dishwashers and detergents got better.

The article mentions that newer detergents do better with unrinsed dishes. And I remember a commercial about a dishwasher that could eat a cake. My old model sure couldn't do that! If I wasn't careful I'd find hunks of food sitting inside after it ran. It also used to be that putting thin tupperware on the bottom rack was a sure way to melt it. Now I can't remember the last time that happened to me.

Things that used to provably matter... now don't.

On the other hand, I have a family member who loads the spoons in a big pile, and they stick together and don't get clean. Or, I had roommates who kept putting my good knives in the dishwasher, and the finish got ruined. That stuff still matters.

I like the article's conclusion: we can just get the answers, and update our knowledge. We don't have to treat this like a pre-internet argument, where we just went in circles repeating heresay.

anon7000 4/17/2025|||
Another example is plates tall enough to block the top spinner. Or plates pressed together so much that water can’t get in between.
hbsbsbsndk 4/17/2025||||
When I was cleaning my dishwasher I realized there are two ways to configure it: with a in-sink garbage disposal, and without. If you don't have the garbage disposal part hooked up there is simply nowhere for the chunks to go and they accumulate at the bottom of the washer beneath a filter.
ioseph 4/18/2025|||
What do you mean by finish? I put all my knives in without issue but probably wouldn't do wooden handles
Swizec 4/17/2025|||
> I used to be uptight about how to load the dishwater until I put away a load that was packed by my partner, "like a raccoon on meth", and noticed there wasn't a difference in the cleanliness.

My partner loads the dishwasher like a raccoon on meth. I do it like a software engineer who's been thinking about The One True Way To Organize Things for decades.

Cleanliness is fine either way. But I really hate that she can't fit a full day's worth of dishes in there so I have to do an extra load later.

grepLeigh 4/17/2025|||
On the other side of this argument, I've seen "just run the dishwasher twice" used as shorthand for giving yourself permission to do whatever is needed to get the job done and not letting perfectionism paralyze you from making progress.

This blog excerpt explains the idea [1]:

> Knowing this week was going to be a lot, I’ve been living by “run the dishwasher twice”. What the hell does that even mean?! Essentially it means to do whatever is the path of least resistance to get shit done. The advice came from a therapist to a woman who was feeling very low & was struggling with everyday tasks such as doing the dishes. She didn’t have the mental capacity to scrub dishes before putting them in her crappy dishwasher so she wasn’t doing them & they were building up & causing her more anxiety. Her therapist said not to rinse the dishes & just run the dishwasher twice, even three times if that’s what it took to get them clean. It was a game-changer for her, one that enabled her to do a small task in an imperfect way just to get it done.

I wish the OP article had dug a little bit deeper into the psychology behind daily task conflict in relationships. The dishwasher is one of many microcosms (laundry, car, pets, etc) that I wish I'd paid more attention to in my relationships, because these conversations really do reveal relationship dynamics around HUGE issues like compromise, empathy, perfectionism, and judgmental behavior.

[1] https://thebackfenceblog.wordpress.com/2021/08/27/run-the-di...

Swizec 4/17/2025|||
> On the other side of this argument, I've seen "just run the dishwasher twice" used as shorthand for giving yourself permission to do whatever is needed to get the job done and not letting perfectionism paralyze you from making progress.

We've found that if we can't do a 10min tasks once, we won't do it twice either. We'll do dishes tomorrow. It's fine.

I used to try the do-a-little-whenever method when I was single and the only outcome was that I spent all day every day dealing with dishes and had a constantly dirty kitchen.

BrandoElFollito 4/18/2025||||
Oh no. 2 loads mean 2 unloads. I cannot exploit my children anymore (their words, not mine) because they are gone so you better concentrate to put everything in one to.
milesrout 4/17/2025|||
[flagged]
grepLeigh 4/17/2025|||
"Give yourself permission" here means acknowledging you're doing a "good enough" job (for now) instead of a "perfect" job, and not beating yourself up about it in the short term. The Wiki article on self-compassion [1] has more context on the therapeutic value of practicing self-compassion and the impact on measurements of life satisfaction/happiness, curiosity, resilience, etc.

Depending on the task/behavior, you may carry the same attitude into the medium/long term, OR figure out how to course-correct medium/long term to align with your values. E.g., if one of your core values is militant conservation of water, either because it's expensive or one of the disappearing resources on Earth, you might strategize ways to conserve your energy to do the best possible dishwasher-loading job every day. That's what I was getting at when I said these type of tasks are "microcosms" because sometimes they reveal misalignment of values.

Why do you say "therapist" here (with the air quotes)?

[1] https://en.wikipedia.org/wiki/Self-compassion

milesrout 4/18/2025||
[flagged]
amanaplanacanal 4/18/2025||
You are being incredibly judgemental about people you don't even know.
milesrout 4/18/2025||
You say that like it is a bad thing.
nullstyle 4/18/2025||
It is, dude with the award for most cowardly hacker news behavior.
milesrout 4/18/2025||
Cowardly?????
ipsento606 4/18/2025||||
> This is lazy and wasteful.

Modern dishwashers are incredibly efficient. They consume insignificant amounts of power and water compared to heating or cooling your home, or taking an extra shower.

Your opinions are your own, but I don't have the slightest hesitation in running an extra dishwasher cycle if it makes my life the slightest bit easier.

milesrout 4/18/2025||
I remind you of what I was replying to.

>Her therapist said not to rinse the dishes & just run the dishwasher twice, even three times if that’s what it took to get them clean. It was a game-changer for her, one that enabled her to do a small task in an imperfect way just to get it done.

This is not about efficiency of the use of the earth's resources. It is about the modern-day priests of America (therapists) telling people that it is okay and good to simply put no effort into anything. That it is acceptable to "struggle to wash dishes" Instead of this person being checked into a mental hospital, instead they are given a coping strategy.

What next? Not doing well in school? Don't worry about it, just use AI to cheat! Not making enough money? Just steal, what's the big deal? Don't beat yourself up, you don't have to be perfect, just get through the day with all your fucking spoons.

xvokcarts 4/17/2025|||
One shouldn't ever be anxious about such things as being wasteful. Mindful, sure, but not anxious - being anxious about such things is actually a pretty good reason for therapy.
9dev 4/17/2025||
That’s not what they said. Don’t be anxious about being wasteful, don’t be wasteful! It’s not some lofty goal or something, but a part of growing up and being a responsible adult.
em-bee 4/18/2025|||
yes, but if trying not to be wasteful creates an anxiety, then you need to treat the anxiety first. in that case giving yourself permission to be wasteful is what matters, and responding to that by telling to person not to be wasteful is counterproductive.
9dev 4/18/2025||
No, that’s just the wrong way to think about it. It’s something that needs doing, so you do it. Are you anxious about going to the toilet? You’re not. You do it as it’s necessary.

Sometimes it helps to stop thinking and start doing. I’ve been there. It takes practice.

tgaj 4/18/2025||
There are people that are anxious about going to the public toilet so I would say your argument is invalid.
AStonesThrow 4/18/2025|||
Speaking of wastefulness and dishwashers, I rent an apartment which does not include a dishwasher. In fact, no apartment I've ever rented included a dishwasher, although many have included a clothes washer and dryer installed.

My kitchen does include a garbage disposal, which is a nuisance, because even though my ex-girlfriend called it "dispose-all", it disposes of nothing, except it effectively annoys 10-30 neighbor families if you manage to clog up the lateral drainpipes, and I don't rely on it to chew up food or any solid waste at all. The only reason I activate it is because it speeds up the draining of water in the dual sink. And also because, if I don't run it on a weekly basis, the motor will seize up in a way that requires a maintenance call, and you don't want to call in maintenance.

Anyway, I wash my dishes by hand, and the bane of my existence is dirty dishes in the kitchen sink when I'm quite hungry and it's 7am and I just want to get breakfast started, but the sink isn't clear and everything I need is dirty, and needs soaking time before the residue will budge, and so I end up punting and ordering delivery anyway.

Washing dishes is a pipeline, a process, that can take 2 hours, or it can last 12 hours, or it can take 3 days to complete. I often don't get around to that magnificent endgame of putting away the dishes but I leave them in the drying-rack until I need them again. It's like my "L2 Cache" for kitchenware, that drying rack. And guess what, when I go to wash dishes again, I often discover there's no room in the rack, and I rip out my hair a little bit and I stop washing the dishes long enough to empty the rack, and then I'm exhausted and I go to lie down in bed instead of washing dishes, or starting dinner, and guess who's ordering delivery again?

So one of the sanity-preserving hacks I've developed is using paper plates, paper bowls, plastic cold cups, and plastic flatware. And this works great for cold cereal, and the raw eggs I drink, and microwaved frozen meals that I can plop into a bowl or put on a plate in order to cut them into pieces.

And I thought that cloth napkins and dish towels were cool, because I was Saving the Earth, and for a couple of years I owned not a single roll of paper towels; I used cloth napkins and I laundered them, and now I use both, and if something is going to stain my precious cloth, then I use paper towels or a disposable sponge on it first.

And they called me "wasteful" for using disposable kitchenware, but in reality I only own a single tablepspoon and a single teaspoon. I own about 3 forks, and 2 butter knives. I recently purchased a set of 4 identical steak knives, because a good sharp knife to cut meats is essential. But most of my flatware is disposable, including semi-disposable chopsticks (set of 8 for about $4).

And guess what? None of the delivery services include plasticware anymore. None of the restaurants tuck it into your bag. They used to give you, like, a packaged knife-fork-spoon-napkin-salt-pepper, sealed in cellophane. Then COVID-19 happened, and plasticware is a cost center, and restaurants hate delivery services for many reasons, and no restaurant carries knives, even plastic butter knives. They are still usually sending me plastic straws, but I nevertheless keep on hand a stock of plastic bendy-straws to use with every beverage.

So basically whether I order delivery or I make food at home, my plasticware suffices, and yeah, it's wasteful and I do not wash or rinse or reuse any of them, and I don't really care, because it is a sanity-preserving strategy that works quite well, because it is much easier to just tuck into a meal when I have flatware ready to use.

milesrout 4/18/2025||
[flagged]
raffraffraff 4/17/2025||||
That's the real difference. I'm playing Tetris, and getting an amazing score. She's leaving a bunch of stuff on the side for the next cycle, or hand washing them.
jeffrallen 4/17/2025||
Crushing the high score here too. Just recently got an entire line of colored kids plastic glasses on the top rack, I swear it made a do-do-do tone when I stopped that last cup in there. :)
mystified5016 4/17/2025||||
For some reason my husband insists on using the "1 hour speed wash" setting and can't figure out why dishes are coming out still dirty...
wahnfrieden 4/18/2025|||
the only reason to have particular care is to avoid chipping
hinkley 4/17/2025|||
What I notice is that the dishes and glasses don't chip when I put them in and I do when anyone else does. Don't matter if there are more clean dishes per load if they're broken, people.
stevenAthompson 4/17/2025||
You are thinking like someone who buys the dishes, rather than someone who wants the person who buys the dishes to get off their case about it so they can do something more interesting.
danielparks 4/17/2025|||
Similarly, I used to stress about loading the dishwasher when I was a teen. I would spend so much time loading it that I have myself a neck ache from leaning over and I could have saved time by washing the dishes by hand.

I still try to be somewhat efficient about loading the dishwasher, but… if I notice myself stressing I just say “screw it”, run it, and wash the rest by hand.

The other thing I’ve realized is that sometimes things don’t get clean if you load them properly. For example, tall glasses that had smoothies in them. It’s a little gross if you don’t notice it until you’re about to use it, but… you can just look at them and wash them by hand when you unload the dishwasher.

I guess this is all to say that sometimes the best optimization is to not think about it too much.

airstrike 4/17/2025|||
IMHO the main advantage of neatly loading dishes neatly is that unloading becomes a 60 second exercise as opposed to a 5 minute one. It's not so much that I don't have 5 minutes to spare, but my back appreciates it if I can get it done quicker. I get 4 plates with each hand, silverware is already sorted neatly... it's just overall a better experience.

In other words, even if you believe the time taken to sort is identical whether you do it loading or unloading, the difference is if you do it while loading you divide that task into many smaller tasks instead of doing one big sorting task on unloading.

taeric 4/17/2025|||
I view it as an area where diminishing returns are almost as soon as you get started. Using a dish washer is already getting a TON of work done for me that I would otherwise have to do. Trying to squeeze any extra from it is kind of silly. I'll always have to run it some more tomorrow.
harrall 4/17/2025|||
I like to re-try everything a new way occasionally even if I've been doing it one way for 20 years.
m463 4/18/2025|||
I think that heavily depends on the specific dishwasher.

I inherited a dishwasher and became more uptight after:

- dishes that left the soap partially unused

- wet dishes

- melted stuff

- stuff that blocked the upper rotating thingie

- stuff that fell into the heating element and bottom rotating thingie

maybe seeking a racoon-friendly dishwasher would be a relationship saver.

atoav 4/18/2025|||
In one of my jobs (civil service) I had to pack and unpack a cheap dish washer, for a horde of unruly kids each day.

If you pack it orderly unpacking is a lot faster. It also helps to avoid problems with leftovers blocking the dish washer. Turns out most dish washer manufacturers thought a bit about how to load a dishwasher ideally (that matches the layout of the machines insides).

For home use with small amounts of dishes it won't really matter tho.

stronglikedan 4/17/2025|||
The only trick is to not block anything from the water, or a direct reflection of it. Other than that, it's a free-for-all.
potato3732842 4/18/2025|||
>and noticed there wasn't a difference in the cleanliness.

If they screw it up good enough there is a difference because the water streams can't get where they need to to get everything sufficiently cleaned and rinsed.

DiggyJohnson 4/17/2025||
> dealies

Not often so I learn a new 5 letter word. I have the same issue with trying to get rid of the fiestaware from my childhood home my mom gave me when I graduated college. It just fits right.

AndrewKemendo 4/17/2025||
The author evaluated their position, measured the situation, sought more information, adjusted their position, independently tested it and updated their position

Scientific method 101

They did it with intentional vulnerability, and took responsibility for themselves at the outset.

We need more of this and it’s rare to actually see someone document it. It requires the ability to be wrong, something that seems to be going extinct …curiously despite it being almost universally accepted as a virtue.

> Last week, I purposefully subjected myself to the real-life version of an anxiety dream. I stood in front of my boyfriend and my parents—three of the people who mean the most to me, and who have offered the most, uh, feedback on my dishwasher-loading abilities—and tried to do the thing. Plates on the bottom, don’t cram too much in there, think about the spray: Honestly, it wasn’t that bad. I thought about the hard work, and the help, required to keep a home. The dishes came out clean.

opello 4/18/2025||
I had a much less rigorous version of this in mind after reading the article but this is exactly what I enjoyed about it. I think you're right that this isn't frequently documented and maybe if it was such responses to problems would be more common.
Henchman21 4/17/2025||
[flagged]
toasterlovin 4/17/2025|||
It’s always been like this, but the old media landscape prevented the coarse and low class from succeeding by making navigation of all the subtle prestige granting institutions of the upper class a prerequisite.
tantalor 4/17/2025|||
Big "im14andthisisdeep" energy.
Henchman21 4/17/2025||
12 actually. Or are you trying to insinuate that my nephew doesn’t exist and that my comment is a fabrication?
efnx 4/17/2025|||
They’re just talking about the energy your 12 year old nephew has.
Henchman21 4/17/2025||
I appreciate this, thank you. I frequently misinterpret this sort of thing.
marcusb 4/17/2025|||
(It is/was a subreddit where many observations of this nature are posted.)
Henchman21 4/18/2025||
I believe the appropriate response is TIL?
masto 4/17/2025||
I'm surprised this Jon Richardson bit hasn't been posted already. It's an incredible piece of comedy, even moreso given that it's about loading the dishwasher.

https://www.youtube.com/watch?v=0Ymh8o6GI_g

pryelluw 4/17/2025||
I’m in the process of adding a second dishwasher in the house. One for clean plates and one for dirty plates.
dalmo3 4/17/2025||
You joke, but I use my dishwasher exclusively as a dish rack. It's just so much faster to do the washing by hand.
cpursley 4/17/2025|||
This makes zero sense. Are you considering the machine time or just loading? Also, machines wash 1000 times better than hand ever could, uses less water, and doesn’t dry out your hands.
pazimzadeh 4/17/2025|||
> machines wash 1000 times better than hand ever could

No way. Not if you're washing with a scrub sponge and scraping the corners of everything. The argument for the dishwasher is that you're not using an old sponge. If your sponge is not nasty, washing by hand should be as good or better.

Night_Thastus 4/17/2025|||
Dishwashers, with rare exception, are much better at washing dishes than people are. They can use water temperatures that would burn skin, pressures that would bruise, and can keep going at it for HOURS without getting tired.

People are lazy. They only look for dirty spots and go for those. They intentionally or intentionally avoid cleaning some areas. Dishwashers don't care what 'looks' dirty - they just keep washing.

Even if you think it's clean by hand, chances are there's far more residual residue and bacteria you can't see that a dishwasher wouldn't have any trouble with.

99% of the problem with dishwashers are that people use them wrong:

* They don't clean the filter and spray arms regularly

* They use the shitty pods instead of powder, which is the most effective since it can have bleach

* They don't put some detergent in the pre-wash

* They have a unit that doesn't pre-heat the water and need to just run the faucet for a bit to get the water hot

* They don't use a rinse aid

If you can avoid those 5 mistakes, a dishwasher will always way out-perform hand-washing. Even dirt cheap basic units you see in low end apartments will do an amazing job if actually used correctly.

nly 4/17/2025|||
Good tablets come with a built-ij dose of rinse aid now. The modern multicoloured ones work much better than the compressed detergent ones.
Night_Thastus 4/18/2025||
Tablets still can't be split into pre and post-wash and they tend to WAY overdo the amount of detergent, because the manufacturer has no idea how hard your water is.
Qwertious 4/18/2025|||
To be fair, I have no idea how hard my water is either.
nly 4/18/2025|||
And yet I've never had any cleaning issues.
pazimzadeh 4/17/2025|||
You're missing the point. I'm not talking about people lazily washing their dishes by hand. I'm talking about focused hand-washing of dishes with many corners, vs. sticking them in the dish-washer.

Like the article mentioned, to get the best result you need to have your dirty dishes line up with where the water is coming out. So if you need to wash something on multiple sides (including top), handwashing will be better.

Hot water is not what cleans your dishes, it's the pressure from the water washing things out (helped by soap). Heat just softens the gunk and oil. Plus you can wear gloves and/or let dishes soak in hot water so that's not even a factor.

By the way, many microbes can survive heat (in spore form), even boiling hot water. Nothing can survive being washed away by soap though. Well, they could survive, but they won't be on your dish.

As a microbiologist I'm aware that what looks clean can have leftover residue. How are you measuring cleanliness out of a dishwasher? I'm guessing by eye, the same way you're measuring hand-washed dish cleanliness.

The way you talk about dishwashers is like you think they're autoclaves, which can actually break spores down using a high heat only achievable in a high-pressure tank (higher than boiling temperature, around 120 celsius). Your dishwasher is only getting about 50 to 60 degrees celsius.

So no, a dishwasher will not always out-perform hand-washing. And if you're using a new sponge, I bet you the result is comparable or better if your hand-washing technique doesn't suck and you should get about the same result with cold water if you use enough soap.

yjftsjthsd-h 4/18/2025||
> As a microbiologist I'm aware that what looks clean can have leftover residue. How are you measuring cleanliness out of a dishwasher? I'm guessing by eye, the same way you're measuring hand-washed dish cleanliness.

So how are you measuring, if not by eyeballing it? Can you swab it and check for microbes? Did you?

pazimzadeh 4/18/2025||
Why would that matter? I'm not the one who stated opinions as fact:

> If you can avoid those 5 mistakes, a dishwasher will always way out-perform hand-washing

> Even if you think it's clean by hand, chances are there's far more residual residue and bacteria you can't see that a dishwasher wouldn't have any trouble with.

The inverse statement is just as likely to be true depending on the shape of the dish used, where it's placed in the dish-washer, etc.. You think just because the corners of a weirdly shaped dish doesn't have obvious gunk after coming out of the dishwasher that they are clean? Well, I trust my hand scrubbing method more since I don't have a camera to see where and for how long the water landed in the dishwasher.

You could swab a plate, do a dilution series and count colony forming units but there's no guarantee that the growth conditions of your petri dish will reflect what can grow in your body (i.e. will the spores germinate in your petri dish?)

What is well known is that washing with soap trumps heat (except 120+ degrees celsius), and you don't need to kill bacteria for a surface to be clean (in fact it's better to wash them off than to kill them). The fact that hand-washing is better for scrubbing corners with soap is obvious. Case in point, this burnt/sticky rice leftover on a pot that I stuck in the dishwasher a few hours ago as a test: https://imgur.com/a/wfnxMnZ

yjftsjthsd-h 4/18/2025||
You did in fact make several claims of fact, and then followed up with an appeal to authority as a microbiologist. Having those credentials means you probably could have verified your claims, but you don't appear to have done so, so we get to hand-wave at each other.

> What is well known is that washing with soap trumps heat (except 120+ degrees celsius)

The dishwasher uses heat and soap. And it sprays things off, while we're at it.

> The fact that hand-washing is better for scrubbing corners with soap is obvious. Case in point, this burnt/sticky rice leftover on a pot that I stuck in the dishwasher a few hours ago as a test

I will happily agree that hand washing tends to win on mechanical grounds. I think that if the machine can spray off the dishes to the point of being visually clean then it probably left them sanitized as well (again, hot water and soap and spraying is compelling to me), but if there's stuff stuck on the dishes then yes obviously a person scraping it off is going to be better at removing it.

pazimzadeh 4/18/2025||
I find it hard to believe that you're still doubling down but only selectively detecting unsupported "claims of fact" without support especially since I made weaker, more situational claims. The original poster commented:

> machines wash 1000 times better than hand ever could, uses less water, and doesn’t dry out your hands

"Ever could"? "1000 times"? And yet you have a problem with me saying hand-washing CAN be better when have dishes with corners or need to wash both sides of the dish. The next commenter said:

> Even if you think it's clean by hand, chances are there's far more residual residue and bacteria you can't see that a dishwasher wouldn't have any trouble with

I invoked being a microbiologist to make the point that I'm already aware of the fact that looking clean doesn't equal being clean. None of my arguments rely on my authority as a microbiologist. Anyone with decent reading comprehension can evaluate the broken logic: he's mixing up the fact that cleanliness is not just what something looks like with the idea that the dishwasher must do a better job than hand-washing because you can't tell if something is really clean or not. That makes no sense, and seems to be some kind of appeal to technology or modernity.

> I think that if the machine can spray off the dishes to the point of being visually clean then it probably left them sanitized as well

This is the exact point that the guy was saying is NOT the case, and as a microbiologist I agreed with him even though it's irrelevant to the argument since neither of us has tested the dishes.

>The dishwasher uses heat and soap. And it sprays things off, while we're at it.

My whole point was that soap and mechanical washing trump heat. My faucet sprays water, and I can evaluate the cleanliness without waiting 2 hours to see if the probabilistic machine jet spray left residue on my dishes or not.

robocat 4/17/2025|||
Glassware looks shiny from a dishwasher.

Glassware looks yuck when washed by hand - even with a lot of care. A dishtowel will get glassware mostly shiny but it takes way more work and dishtowels are just icky (past trauma of smelling a rank dishtowel, or watching someone wipe their mank hands or face on a dishtowel, plus you know most people wash them with underwear, fabric can't be hygienic).

bigstrat2003 4/18/2025||
> Glassware looks shiny from a dishwasher.

It most certainly does not in any dishwasher I've ever interacted with. Glassware is one of those things that I can very easily get cleaner than a dishwasher.

pazimzadeh 4/18/2025||
Maybe glassware is just easier to evaluate whether it's clean or not?

But just like looking clean doesn't mean being sterile, sometimes you can have benign residue such as mineral deposition which are not dirty per se.

nonethewiser 4/17/2025|||
It makes perfect sense. It takes about 20 seconds to wash 1 dish.
tombert 4/17/2025|||
If you're only using one dish, then sure it's probably better to wash by hand. No one I know has ever suggested running a dishwasher for one dish.

Dishwashers can handle a lot of dishes and loading them takes like five minutes. Yes, it might take between 2 and 3 hours to finish washing, but it's asynchronous, you're not involved with the process. I usually load and start the dishwasher right before I go to bed.

This is not even to mention the fact that many dishwashers can sanitize dishes better than you can by hand since they can get very hot and maintain that heat, and the fact that they use considerably less water.

ac29 4/17/2025|||
I'm usually getting ~40 dishes and ~40 utensils into the dishwasher per load, which at 20 seconds each is like half an hour. I can load the dishwasher a lot quicker than that.
nonethewiser 4/17/2025||
You also need to count the time for it to wash them and unload them. Washing is async which means its less active work, but it’s definitely includes in how long it takes.

The more dirty dishes you have the better the dishwasher becomes in terms of active work but in no scenario is it actually faster.

onli 4/18/2025|||
You do not need to count that time. There are very few situations where the time which is not active work time matters. Dishwasher uses up less of your time (and saves money, energy, water). Note the origin statement: It's just so much faster to do the washing by hand. It's completely wrong, but makes clear what kind of time is to be measured here.
albedoa 4/18/2025|||
> You also need to count the time for it to wash them

You do not. We are comparing the time it takes for a man to wash a dish versus the time it takes for that man to put that dish in the dishwasher, not versus the time it takes for a machine to wash that dish.

spiffyk 4/17/2025||||
The time the dishwasher takes to wash the dishes is time you yourself can use for literally anything else. Not to mention the savings on the water bill and the much higher quality of the wash. The only objection I can think of is if you do not have enough dishes, which means the dishwasher "locks in" the dishes for some time, but the real solution to that is to simply get extra dishes so that you have some to use while the dishwasher is running – seriously, it will pay for itself in no time.
dalmo3 4/17/2025||
Sure. I'm in a household of 2 and wash after every meal. It takes 5-10 minutes, and I'm thorough. Then unload it once a day.

Unloading is the most annoying part, and needs to be done anyway however you wash it. So, not a huge chore.

Most importantly, I live in a small apartment and I hate the noise it makes.

HeyLaughingBoy 4/17/2025||||
Even if the washing happens when you're sleeping?
pryelluw 4/17/2025||||
I’m not joking. I am indeed in the process of doing so. Working on the placement at the moment. Requires extending the counter.

Also, I’ve worked as a dishwasher and don’t want to do more of that ever.

saltcured 4/17/2025||||
Hah, we have a habit of using them as a drying rack after handwashing too. With the lower rack pulled out and resting on the open door, so air circulates well and things dry pretty fast.

Eventually, you think about running the washer just to clean itself. But, you wonder if the thing will surprise you with leaks if you do run it, because it has been months or more and who knows if the seals are working...

cryptonector 4/18/2025||||
Dishwashers are a lot more water efficient than most people hand-washing.
tgaj 4/19/2025||||
I don't think it's a joke. It's something that people are really doing (I will in my new apartment)
f4c39012 4/17/2025|||
and you can put on a podcast
h4x0rr 4/17/2025||
Ah yes, the genius lazy method You just need to keep in mind that there's much less space in a dishwasher than in a closet
cpursley 4/17/2025||
There’s actually a 3rd type that I discovered while house sitting: people who load their knives pointy side up. Absolutely insanity.
saxelsen 4/17/2025||
I don't understand what's wrong with this.

The handle is typically loaded so that it weighs a lot more than the blade, which means they're likely fall out of the basket if they're blade down.

Also: blade down, you can't tell which ones are the knives unless you only do knives blade down (but forks and spoons handle down), which seems even more insanity to me..!!

autoexec 4/18/2025|||
It's easy to cut yourself emptying the dishwasher if knives are point up, but since you're in the kitchen which can have slippery floors and there's usually an open door low to the ground and a lot of moving back and forth there's also a small risk of slipping/tripping and falling onto the knives final destination style and impaling yourself on them. Ideally pointy things point down and spoons go up.
crazygringo 4/17/2025|||
Dishwasher utensil baskets have compartments tall and narrow enough that the knife is not going to fall out. I haven't had that happen ever in my life. Even with heavy handles. (If it's as large as a chef's knife, however, that lies down flat in the upper rack.)

And yes, you do only knives down. If you did spoons and forks down it would be too crowded at the bottom. I don't know why only knives down seems like insanity to you?

I mean, I'm glad you've never sliced your hand on a thin paring knife sticking up at an angle that makes the blade virtually invisible. But hey, it's your hand you're risking, not mine...

opello 4/18/2025||
It seems like the comment you're replying to is likely referring to butter knives. But if your paring knives match your other flatware it seems like a pretty reasonable confusion.
vt240 4/17/2025|||
This is a mistake you only make once. Lesson learned when I put a boning knife through my arm in the dish rack one day. Cost me a trip in the ambulance. Absolute insanity– correct! I don't even know how it got in there with the rest of the utensils. But I triple check the sink area every time now.
cpursley 4/19/2025||
Yup. Kitchen knifes are still a large percentage of emergency room visits.
omnibrain 4/17/2025|||
Buying a dishwasher with a third rack right at the top for cutlery fixes that.
esperent 4/18/2025|||
I have a dishwasher that does this. It was in the house already, I used it for at least a month wondering why it didn't have a proper place to put cutlery before I tried cleaning the top and realized there was a drawer hidden there!

It's a great feature, but since the dishwasher has a standard height to fit under the counter, it means the bottom rack is a bit shorter than standard and I have to be very careful stacking plates to avoid blocking the washer arm. And there are a few large plates which I'm sure would fit in most washers which I have to wash by hand, like a caveman.

On balance it's a good feature though.

tgaj 4/18/2025||
Some dishwashers have an option to change the height of bottom rack by moving upper rack up or down. You should check that, maybe it's you dishwasher too.
iainmerrick 4/17/2025|||
This is the absolute best feature any dishwasher can have. I can’t go back to having one of those awkward cutlery baskets now. Besides doing a terrible job with the cutlery, it just wastes so much space that could be used for plates and cups.
cubefox 4/17/2025|||
I do this, but I'm also against pointy knives. There is no reason for a knife to be pointy unless you are a professional knife thrower.
cpursley 4/19/2025||
Any recommendations on decent quality non pointy knifes? Gracias.
sudoanon 4/20/2025||
Check out these Mac Knives, excellent Japanese cutlery with rounded tips:

https://www.macknife.com/collections/original-series

And the Victorinox "Swiss Classic Picnic Knife", very sharp, good for slicing fruit, spreading hummus, cutting bread & cheese, etc. Also available serrated but I figured the straight edge would be more useful overall for spreading stuff on bread -- and it is, this lives in my lunch bag along side a Snow Peak Titanium Spork:

https://www.victorinox.com/en-US/Products/Cutlery/Paring-Kni...

(shown here in Red and Black, but if you look around it's available in many other colors). I've found the Victorinox Fibrox line of knives to be a great affordable, high-quality option.

lupusreal 4/17/2025|||
I've had so many fights about this. "They wash better, just be careful!" Absolute insanity is right.
philsnow 4/17/2025||
Why are pointy knives going in the dishwasher, though?
cpursley 4/18/2025||
Some of us aren’t Kobe beef chefs and like to actually clean our utensils and dishes…
esperent 4/18/2025||
If you have any knives with wooden handles and you want them to last, probably shouldn't be putting them in the dishwasher.

> like to actually clean our utensils and dishes…

If only there was some other way to clean things...

amanaplanacanal 4/18/2025|||
I haven't owned any kitchen knives with wooden handles for years. Probably part of the gradual replacement of plastic for wood that's happening just about everywhere.
cpursley 4/18/2025|||
Which other ways are there without burning a layer off your skin and that clean as well as a dishwasher machine?
antisthenes 4/17/2025||
I just wash dishes by hand while I wait fo the kettle to boil for my after-food cup of tea.

It's therapeutic, takes a few minutes, and makes me conscious of how many dishes I should be using (e.g. as few as possible). If I have to pre-rinse dishes for the dishwasher, I might as well just rinse it fully then and there.

ThePowerOfFuet 4/18/2025||
> If I have to pre-rinse dishes for the dishwasher, I might as well just rinse it fully then and there.

That's the point: you _don't_ have to. Scrape off the majority of the food, use the right amount of soap (and add some on the inside of the door for the prewash), and you'll be surprised at the results.

ThrowawayTestr 4/17/2025|||
You don't need to pre-rinse.
Noumenon72 4/18/2025||
I write my posts with a chisel and clay tablet because it makes me conscious of how many words I should be using (e.g. as few as possible). No, writing words is cheap now, so I can use more words.

Because dishwashing has made clean dishes abundant, we should use more of them than previous generations, opening up more pleasing recipes and more courses per meal.

alexjplant 4/18/2025||
> Here’s the third big thing: Rinsing isn’t necessary. Oma Blaise Ford, a senior executive editor at Better Homes and Gardens, told me that overrinsing is “one of the most common mistakes in modern dishwasher loading.” She recommends scraping leftover food off your dishes into the trash with a rubber spatula and immediately loading them into the machine, without even turning on the faucet.

I've always done this out of stubbornness. If I have to turn on the faucet then I might as well just wash the dish by hand. If the dish is still dirty after a cycle then I'll do exactly that and let it air-dry.

snapetom 4/18/2025|
I don't know how many arguments I've had with how many partners I've had about this.

It's a dishwasher, not a dish re-washer.

My wife and her family are all freakin' religious wash first, then put it in the dishwasher. My father in law snapped at me about this once. I'm going to send this to him.

schiffern 4/18/2025||
If it's not full enough to run, but you also don't want wet food residue to dry on and stick, most dishwashers have a "Quick Rinse" setting that's designed for exactly this purpose.

Scrape, load, and then run Quick Rinse. Much more efficient than rinsing by hand!

1970-01-01 4/17/2025|
What we really need is the double-wide or triple-wide dishwasher. If everything fits in one load, you're always all clean in the morning and all dirty in the evening. Now it's just a daily habit of putting things away in the morning and popping things in after you're done eating each meal.
tomatocracy 4/17/2025||
How about just keeping two dishwashers? One starts full of clean stuff and you use it like a cupboard, taking stuff out of it as you use it. The other starts empty and you add stuff to it after using it until you have transferred everything from one to the other. Then you run the full one and start again.
masto 4/17/2025|||
Ours is a Fisher & Paykel dual dishdrawer, which does exactly that, in the space of a single unit.
RandallBrown 4/17/2025||||
I saw this "hack" on instagram or something and if I ever get a kitchen big enough for two dishwashers I fully plan on doing this.
folmar 4/17/2025|||
Doesn't really need two dishwashers, just two set of racks and a cupboard that can accommodate the other set.
stevenAthompson 4/17/2025|||
Why don't we just build the dishwasher into the cabinets? Then putting them away and washing them is the same chore.
bombela 4/17/2025||
You can purchase dishwashers designed to have a cosmetic door overlay.

You can also do this for drawer style dishwasher. Giving it quite an inconspicuous look.

iainmerrick 4/17/2025|||
Do you get through more than one dishwasher load of dishes in a day? That seems like an awful lot of dishes.
331c8c71 4/17/2025|||
You're American right?;)
dan353hehe 4/17/2025||
We would probably call it a “freedom”washer though.
ghaff 4/17/2025||
Please. It’s welcome that compared to fridges dishwashers are pretty standardized.

But I am a bit surprised that more people who entertain a lot don’t have two dishwashers. But they probably have staff for that in many cases.

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