Bought a new crystal call a few weeks ago. When I got it I couldn't have been more impressed. It came pre conditioned and even I could make good turkey sounds. Seemed so easy and I was glad I finally jumped out there and bought a quality call. Now that I have played with it for a few weeks it has developed a squeak. I have to get everything just right but every few notes I will still get a squeak. So I figured it and the striker need roughed up. I have tried a conditioning stone, scotch brite and 320 paper. It gets a little better but I cant totally get rid of the off notes. Any help or suggestions on getting it back?