[tasogare]

It’s bit ridiculous to ask for a citation for something as simple as washing hands. You could try for yourself during a week and see if it change something.

[mattkrause]

Just to play along here....how do you propose that they check whether the cold water removes bacteria more effectively?

[Zircom]

They were referring to difference between hot vs cold water and it drying out your skin, not the effectiveness of cold vs hot water at sanitizing.

[mattkrause]

I read the "paranoia about cleanliness" bit as suggesting both.