On 01/12/2020 00:17, Buffalo wrote:

So, it seems that the common opinion is that body oil stains on
sheets,pillowcases, socks, underwear, etc and oil and grease stains in
clothes will come out cleaner with COLD than with HOT water?
I find that very hard to believe.

No, its that washing machines are designed to take out the majority of
common stains which for some require a cold wash and for others maybe a
hotter wash so they start with cold and then gradually heat the water.
It is the detergent doing most of the work rather than the hot water.

For instance, try getting blood out using hot water first.

Consider hand washing dinner plates and cooking utensils - you are not
going to plunge your hands into 90C water but you can still get all the
fat etc. off with much colder water and some washing up liquid.

If you take a bath or shower what temperature water do you use to clean
yourself of all the bodily fats etc.? You'd probably have to give
yourself a boil wash if you didn't use soap, gel or shampoo.

95% of machine washes in my household are with cold water, no heating,
in my washing machine.

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