I've got a little tiny one on the front display of my Flip. I don't see it a lot, but several times I've tried to "wipe it off the screen" when I see it.
i'm a hairy guy....sometimes the chrome piece pulls my beard hairs, i'm sure there are a few from my hair line by my eye from the earpiece...and the buttons are notorious for pulling out chin hairs
but idk if any are under my screen, i haven't looked...damn it, now i'm gonna be staring at my screen...i'm gonna find every imperfection in it now and i'll never be happy