By playing? Or is it just me? I use fairly heavy Dunlops and the edges of them get pretty rough after one long rehearsal or gig. I don't like what that does to my tone. So I use 600-grade sandpaper to smooth them out. But within a few days the tip of the pick gets pretty rounded (which I don't really like). I'm also wondering if there's a pick out there of comparable thickness and flexibility that doesn't get chewed up so quickly.