pharmakos
Bluelighter
Yeah something cheap and inconspicuous like rubbing alcohol would be absolutely perfect. I'll check out my local hardware store for sure.
i just get mine from a super market

Sorry for the dumb question, but how about that gel alcohol hand wash as used in hospitals; I wonder if that would evaporate. I'm guessing almost certainly not btw.
sounds like a long shot. i wouldn't try it.