My tint is being scraped by somthing in the window mechanism, but I don't know exactly what's doing it. The driver's side has scrape marks along the whole length of the window (most prominently in three places) and the passenger side has it in just one place (about 8 in. from the front edge of the window). I've heard that the felt rollers that help guide the window on it's track can wear out and cause some of these scratches. What else could do this? I'm thinking about taking the door panels off to investigate. Does anyone know how to do do this? It's time for a re-tint and I don't want these scratches to come back... Thanks!