Yeah I just cleaned it pretty good and there isn't really any shinier section on it so I think when I cleaned it and ran it back and forth on there, before thinking about this issue, I may have ruined my movement evidence. Lol. I would screw something up by cleaning dirt out. That just seems to be how my projects go sometimes. And I spent about 30mins cleaning that out and using all my might to slide it back and forth as far as it would go to make sure it would slide good haha.