My windows on both sides are difficult to roll up and down and because of the difficulty they often fall off the arm. The rear track appears to have a little fuzz left but not much and the front tracks both have the rubber gaskets that slide up in down the metal channel. I have tried adjusting the channels forward and backwards but still have the problem in both windows.

I have not seen this topic discussed before and I tried a search but couldn't find anything on it. Even sliding the window up and down by hand it kind of difficult at times it sort of sticks in the tracks. I cannot see anywhere that the tracks are pinched front of rear. Any info would be great.