You know, not having any experience in indoor gigs (yesterday was only our second gig, and we practice in a room right after a jazzercise class where all kinds of sweat lands on the floor), I wasn't too worried about this until I saw this thread and realized I may be guilty of this faux pas. I had put a handkerchief on my stand yesterday with the intention of using it on my waterkeys for politeness. Question: How do you know you're playing in a retirement home ? Answer: they keep the heat at 77 deg. So I was sweating on stage and decided mopping my forehead was the higher priority ! I'm sure the rug has worse stuff in it already.