Driver door window regulator was replaced in 2012. It has never been easy to operate. I oiled it when I installed it but it did no good. The passenger side works smoothly with little effort but the driver side is so bad I can't get it all the way up from the driver seat. Takes two hands. I put some silicone lubrication in the window tracks but that didn't help. I know the door panel will have to come off again but what after that? Anyone cure this problem?