[JohnWhigham]

you can't wash with cold water because soap doesn't activate with cold water

Bunch of pseudoscience. I've never noticed any difference between washing with cold or not.

hot water also kills bacteria

Ultimately doesn't matter because they're all being washed away by the soap molecules anyway.

The act of standing and using our arms releases...

Lol, are you seriously trying to reason that what little energy you burn is more than a dishwasher?

[dijit]

> I've never noticed any difference between washing with cold or not.

Soap not activating when cold is not "pseudoscience", it's just a fact. Like grease doesn't become liquid unless heated. It's a similar principle.

> Ultimately doesn't matter because they're all being washed away by the soap molecules anyway.

If they bind, but, I'll give you this one.

> Lol, are you seriously trying to reason that what little energy you burn is more than a dishwasher?

Humans are pretty shitty at expending energy. This is one of the largest arguments against cycling long distances (though those arguments I don't agree with, but we're talking about total Co2 output here).

[BenjiWiebe]

I've worked in a cheese plant. The metal forms can be very greasy, and as the soap water cools off it is very noticeable that stuff doesn't want to get clean. Heat the water back up, and stuff cleans far easier.