Having an issue with the window jamming up. It will roll up about half-way and then it cocks toward the front and gets jammed. You can easily dislodge it by hand or by rolling the window back down, and if you hold the window straight back toward the rear while rolling it up, it does just fine. Seems like the problem is the liner inside the window track. I adjusted the track inward as far as it will go, but no change. Still lots of play and gets jammed. Anyone know where to buy new liners for the window tracks??? Can't find it in the places where I usually buy everything.