I've washed SD cards, cf cards and memory sticks and they all still work.
Keyboards can also survive dishwashing with gentle soap. So can motherboards
Keyboards can also survive dishwashing with gentle soap. So can motherboards
I don't advise it, but tech can take quite some abuse.
Strategically placed underwear and socks can do wonders to protect things.
(never tried it with a wireless one, so...)