When purchased this truck po said that power windows would get slow to operate so he would spray track the silicone to free up. I figured the motors where getting weak so we replaced pass and drivers same problem so I returned them. When we had the new motors installed I removed some the trim (weather stripping ) in tracks and that seemed to help a lot. Seems like maybe this trim has shrunk and squeezing glass making it hard for window to operate? Has anyone seen that happen?