The window on the driver side of my 96 cabrio is grinding when i try to put it up or down. Most of the time (99%) the window won't go all the way up, so i have to have someone stand on the outside of my car to pull the window up the rest of the way while i am inside pushing the electric switch. My nephew is very good fixing any kind of car, he tried getting the door panel off to take a look but couldn't. Need help on how to get this panel off...please!!!!