My driver's side rear window has fallen. I got the door trim off and noticed that the glass channel that fits on the bottom of the window had come off. It was a real pain but I got it back on and the regulator wheel back in place. I ran the window up and down 20 or so times before putting the trim and other pieces back on. The next day I am driving down the road and decide to roll my windows down, and clunk. I hear the glass channel piece fall to the bottom of the door and the window slowly slides down. Do I need to use some sort of epoxy or glue to keep the glass channel on? The FSM really doesn't say anything about it other than showing the individual parts.