* HEAT melts fat; this is why it is so good to use water above 25 degrees Celsius for washing hands, clothes and everything. In addition, hot water makes more foam and that makes it even more useful.
Swampboots. Thanks for that excellent list. I will quibble with the heat comment a bit. Warmer water may indeed help foaming action. However, the heat needed to kill the coronavirus particle is much higher than any tap water, well any water you would use. It requires 132°F or or 56°C, which would cause severe burns.