I have a problem. My pick rotates on me. I usually play in a "root-strum" fashion - very easy, comfortable and unchallenging. No problem holding onto the pick there. But whenever I start to do a "down-up" rhythm pattern, the pick slips. More accurately, it rotates clockwise. At some point I have to pause and re-grip it. If I try to hold it more tightly to prevent it from slipping, it sounds like I'm dragging or scraping it across the strings and sounds awful.