[hshdhdhj4444]

> A hot prewash helps loosen fat, that was his claim. Anecdotal experience suggests to me that he's right. So maybe try to disprove that instead?

I don’t know who’s right but the article here already addresses this by pointing out that the short bursts of hot water in a prewash will never have as much impact as the sustained hot water wash in the main cycle.

The author of the post isn’t denying that a hot pre-wash will clean more than a cold pre-wash. What they’re saying is whether the hot pre-wash cleans more than a cold one is irrelevant to the final result since whatever the cold pre-wash doesn’t clean will almost certainly be cleaned in the longer, sustained, hot main cycle.

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Hot water is more effective at removing/reducing fat, I think everyone agrees with that. But then the question becomes "Does something get cleaner if you have two hot washes instead of one cold and then one hot?". Personally for me, it feels obvious that if someone doesn't deny "hot water will clean more than a cold water", then they also shouldn't deny "Two hot washes makes something cleaner than one cold and one hot", mainly because that's more hot water, and we already agreed hot water cleans better. The more clean hot water you can apply, the cleaner that thing becomes, I guess would be my conclusion.

[EnPissant]

Then why not 3 hot washes?

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I'm sure there are dishwashers that does 3 cycles, but afaik, most do 2.

[EnPissant]

That doesn't answer the question.