After installing my WeatherTech vent visors, I noticed that the driver side window was loose. By this I mean I can physically pull the glass up and down about a half an inch or so. Im not sure if thats normal, since I've never noticed it before. Is there a way to tighten the clamps on the window lifting mechanism. I know on my wife's VW I have already had to do this a few times, but there is an access hole in the actual door. Now that I have the vent visors installed, once the glass goes down past the flange on the visors, it drops a little. I know this is happening because of the tight fit between the glass and visor, and the restriction is holding the glass up while the window lifter is going down. Anyway, if anyone knows or has done this before, I would really appreciate your input.