My driver's window was having difficulty closing sounded like the motor was always struggling for the last 4 inches. Finally broke. I replaced the regulator, only to have the same burden being placed on the new regulator and motor. I greased the window guides/grooves as best I could - didn't help. I attempted to bend the front guide by reaching into the door while it was still open. Didn't seem to help much (nor can I imagine how anything got bent - that would need to get unbent). Does anyone have any idea how to solve this window problem?