A shower or bath before bed may be fine, but don't go to bed with wet hair. Your pillow and bedding will be become a zoo of micro-organisms living on your skin cells plus the water your hair provides.

Gross, eh what?

I don't see anything here about the old and vulnerable. Who do you know who's 80 or 90 and living alone? Your aunt, your father's old friend, your neighbor. Such people need to be checked on. They can do crazy things like be afraid to turn on a fan.