Technology Connections explains how dishwashers work, why detergent pods underperform powder, and how to use the pre-wash and main-wash compartments. It argues you don't need to pre-rinse dishes.
Why Hacker News points people here: HN repeatedly recommends it as the definitive, mind-changing explanation of dishwasher use, even though it runs over 30 minutes.
“I highly recommend you watch this video by Technology connections[1], I too used to think I had to rinse my dishes before putting them in the machine.”HN comment, 2022
“I highly recommend you watch this video by Technology connections[1], I too used to think I had to rinse my dishes before putting them in the machine.”
Changed commenter's mind about rinsing dishes before loading
Full comment
I don't have any issues putting dirty dishes in my dishwasher. Do you use pre-wash detergent in your machine? I highly recommend you watch this video by Technology connections[1], I too used to think I had to rinse my dishes before putting them in the machine. [1]: this video
Strongly recommendschillingeffectJan 2022
“This[0] and this[1] are the ultimate dishwasher talks.”
Considered definitive dishwasher talks
Full comment
This[0] and this[1] are the ultimate dishwasher talks. From what I gather, European dishwashers heat the water, while American do not. [0] this video [1] link
Strongly recommendsbentcornerApr 2022
“I love this video”
Explains why pods wash worse than powder
Full comment
I love this video: this video Dishwasher pods are heavily marketed in the US and actually wash more poorly compared to plain powder. With pods the pre-wash ends up running without detergent, so rinsing off dishes becomes necessary.
Strongly recommendslbutlerMar 2023
“the two Technology Connection videos on dishwashers are must watch”
Must-watch dishwasher videos
Full comment
For those that haven't seen them, the two Technology Connection videos on dishwashers are must watch 1 - this video 2 - link
Strongly recommendsmastercheifJan 2024
“Technology Connections’ video on dishwashers will change your life.”
Life-changing dishwasher advice, with a dosing caveat
Full comment
Technology Connections’ video on dishwashers will change your life. this video Ever since I switched to powdered detergent and started throwing a pinch of powder in the bottom of the tub in addition to filling up the main dispenser halfway, I have not had a single dish come out with a piece of food on it. I also recommend disabling any “auto” features of dishwasher has. The only caveat to this video: don’t fill up the detergent dispenser all the way with powder, go about halfway. He corrects this mistake in his follow-up video, which I also recommend.
Recommendsthrow0101aMay 2021
“Technology Connections has got you covered”
Explains how dishwashers work and how to improve performance
Full comment
Technology Connections has got you covered: > Ever wonder how dishwashers work? Are you ever bummed by the performance of yours? Well, this video can answer your question and possibly provide you with a solution! * this video
Recommendssp332Jun 2021
“You don't have to pre-clean dishes. This video is a bit long-winded but gets the point across.”
Shows you don't need to pre-clean dishes
Full comment
You don't have to pre-clean dishes. This video is a bit long-winded but gets the point across. this video One person doing one person's worth of dishes is pretty manageable. Once you get more people involved, or if you're getting a lot of utensils dirty while making something fancy, it can be a whole different story. Also, I think they use less water than washing by hand, but again this depends on how many dishes you put in there at a time.
RecommendsbalefrostSep 2021
“if you want to watch a 32 minute video about how to properly use a dishwasher, here you go”
Long video on using a dishwasher properly
Full comment
Somewhat related: if you want to watch a 32 minute video about how to properly use a dishwasher, here you go: this video
RecommendsslantyyzJan 2022
“The Technology Connections channel on YouTube has a couple of pretty interesting videos on how dishwashers work”
Interesting explanation of how dishwashers work
Full comment
Sadly, I don't think dishwashers will last 20 years any more. Since 2005, I'm on my third dishwasher. The first one lasted 9 years, the second one around 5 (with one under warranty repair). At some point the repairs/parts cost more than what the original dishwasher is worth. Regarding the algorithm, I'm not sure they make a huge difference anyways. FWIW, The Technology Connections channel on YouTube has a couple of pretty interesting videos on how dishwashers work and how to get the most out of them: this videolink
RecommendsrubenbeMay 2022
“I stopped using the default "eco" program and switched to the faster "auto" program on my dishwasher since watching this video”
Explains how dishwasher programs actually work
Full comment
I stopped using the default "eco" program and switched to the faster "auto" program on my dishwasher since watching this video on how these programs actually work: this video TLDwatch: eco programs use only one batch of water, others use two and that results in cleaner dishes with the added benefit of a faster program.
Recommendsbick_nyersMar 2023
“here is a wonderful 30min deep dive by none other than Technology Connections about dishwashers and detergent usage”
Deep dive on dishwashers and detergent usage
Full comment
Dishwashers contain a heating element no? Not sure if booster powder is a specific product but yeah detergent on the little lip of the main detergent door is a significant help. For those interested, here is a wonderful 30min deep dive by none other than Technology Connections about dishwashers and detergent usage: this video
RecommendsharrisiJul 2023
“Some useful videos”
Useful dishwasher videos
Full comment
I've gone back and forth with dishwashers my whole life, spending years with followed by years without, etc. and I finally am team dishwasher. There are a few tips I've learned, such as immediately rinsing a dish after using (I don't bother scrubbing), running the hot water for a minute before starting, using the pre-wash detergent and shine stuff appropriately. I also don't bother entirely filling it up to run it - which may seem wasteful, but I'd imagine filling it completely and having to rewash some percent of them ends up being more wasteful. Also, just like getting a manual dishwashing routine figured out, dishwashers are all different and need to be learned like any tool. Understanding where pieces are, which cycles run when, which compartments open and close and even how they do it, are all important. It really is best to think of it as a tool. Some useful videos: this videolink
RecommendsenragedcactiSep 2023
“for more info there is a great Technology Connections video covering it”
Great coverage of powder vs pods and prewash detergent
Full comment
For anyone who is upset with the performance of their dishwasher there is a really really easy thing to try. First, replace your pods with a box of powder detergent, then add some detergent to the prewash cup on your dishwasher in addition to the normal dispenser. If your dishwasher doesn't have one you can just put some on the door before you close the washer. This gives your dishwasher detergent to work with on two of its cycles rather than just one and in my experience it makes all the difference on really difficult dishes. The pods are effectively identical to the powder detergent but at a huge cost premium and don't give you the ability to adjust your amount of detergent to match the water hardness in your area which can result in a film on your clean dishes. for more info there is a great Technology Connections video covering it: this video Alternatively you can test this by just throwing an extra pod in the bottom of the dishwasher to start with. If it works well then you can consider switching to powder to save costs.
RecommendszahlmanDec 2024
“Technology Connections' series on dishwashers”
Series with more on operating a dishwasher
Full comment
Relevant - since there is more to learn about operating a dishwasher: Technology Connections' series on dishwashers - this videolinklinklink
RecommendscodethiefNov 2025
“Never would have thought I could listen to someone talk about dishwashers for 30 minutes but it was surprisingly fascinating!”
Surprisingly fascinating 30 minutes on dishwashers
Full comment
I remember watching this[0] video by the OP a couple years ago. Never would have thought I could listen to someone talk about dishwashers for 30 minutes but it was surprisingly fascinating! [0]: this video
Cites itspijdarAug 2021
“I believe it's covered here”
Believed to cover dishwasher water and energy efficiency
Full comment
I haven't watched this video in a while so apologies if it's not specifically elaborated on, but I believe it's covered here: this video From memory yes, it's partially about water usage, but dishwashers are in general just pretty good overall about efficiently using energy to maximize "food grime removed" per unit of resources fed in. Even if you're careful with water usage while hand washing, I think a decent dishwasher will beat you. Another advantage is the dishwasher heats its own water, whereas with hand washing either you need to use a house-wide water heater or preheat water in a kettle or something, which will have its own energy wastes. This of course depends also on how your house's water is heated. One page I found googling elaborates on these ideas, concluding that you could potentially be more efficient hand washing, but only with a lot of effort: link
Cites itmr337Sep 2021
Source for using detergent in the pre-wash pocket
Full comment
So one thing that really surprised me is the little pocket on the soap tray. I started adding some liquid soap there as part of the loading and saw a big improvement on cleaning result. The idea is during the first pre cleaning cycle the soap will start working so you add the detergent on dish time. this video
Cites itCaliforniaKarlSep 2021
Original video that the followup builds on
Full comment
This is a followup to "Detergent packs are kinda wishy-washy (Dishwashers Explained)", this video Posted to HN at link and link
Cites itnrvnJan 2022
Cited as evidence dishwashers need no smart features
Full comment
here is the problem statement: 1. Get a technology proven to have solved a given problem more than 100 years ago. 2. Throw ICs on top of it. 3. Put “smart” into marketing materials. 4. … 5. Profit There is nothing in any dishwasher[0], fridge, vacuum cleaner, washing machine, $ {you_name_the_home_appliance} that would require to be smarter than they are without those (actually far from smart) hardware and software that is being installed and imposed on customers. If combined with the planned obsolescence[1] it creates a perfect combo. [0] - this video [1] - link
Cites itchongliSep 2023
“You should be using powder in both boxes so the prewash cycle and the main cycle can work [1].”
Source for using powder in both detergent compartments
Full comment
Either your dishwasher isn't very good or you aren't using it properly. You should be using powder in both boxes so the prewash cycle and the main cycle can work [1]. Pods? Waste of money! [1] this video