Come on, this is simple mathematics.
What type of keyboard is it? * easy to clean / hard to clean * valuable / cheap *
Is it rare? What is it worth?
I might be inclined to harvest the keys, sanitize them with bleach, and toss the board, unless it could be disassembled and thoroughly disinfected.
On the other hand, you could tell your friends about it,then NO ONE would borrow or steal it from you, no matter how desirable it is!