This is another commonly asked question and is sometimes confused with being a defect in the film; however, it is actually caused by a vehicle’s weather stripping. You’ll notice a fuzzy, felt-type material that lines the weather stripping around your windows. This felt functions as a trap for small particles of dirt when you roll your windows up or down. Some vehicles have both sides lined, some only have the exterior side. When only the exterior side is lined it makes the interior more susceptible to trapping dirt and debris. When you roll your windows up or down, the dirt, or sometimes even the hard plastic of the stripping itself, can cause the film to scratch.