I wash them with bleach in the washing machine with a double rinse. They get much cleaner than with using the hose, IMO. Somehow even with a powerful hose, the pores in the socks don't get that clean.
I air dry them, then rinse again before putting into the tank.
I wash the husband's clothes (not mine) in the following load. So, if there's any icky residue, it's on his clothes :lol: