I wouldn't want any other person to touch my keyboard. I blame the lack of accessible cleaning supplies and the fact that if anyone higher up sees me not staring at my screen with a hand on the keyboard they'll think I'm lazy and not working. Which is true, but they don't need to be thinking that.

I maintain that nitrile gloves should be part of any functioning IT team's toolbox.

Just avoid the back or powdered ones, they make screws very hard to see, I use green gloves from Ansell, or failing that purple gloves from Abena, the powder is just annoying.