Pass The Disinfectant, Please

I have a problem with the communal bathroom key.
Think about it.
Firstly, you’re assuming the Bathroom User ahead Of You (henceforth referred to as BUOY) washes his or her hands before returning the keys.
Secondly, you’re assuming the BUOY places the key in a relatively sanitary area of the bathroom.
And lastly, you are of course assuming that BUOY is not holding the key while doing the business.
Hell no.