I recently set my hat down at a work party, and someone apparently picked it up with residue on their fingers and left two faint fingerprints on the underside of the brim. AHHH, lesson learned! Never even occurred to me, (A) that someone would fondle my lid and (B) that it would be noticed as I thought I had set it well out of the way. The other thing that amazes me is how little some people know about handling a hat!!