[email4eric]

I wash my hands before I play if they're dirty, oily, or otherwise fouled. I don't wash my hands before I play if they're not.

Now that I think about it, I wash my hands if they're dirty, oily, or otherwise fouled anyway.

Furthermore, I tend to pick up a guitar spontaneously throughout the day. Washing my hands as a rule before doing that would crimp that spontaneity.