Just a shot in the dark, but do your windows squeak when you roll them down? Both my driver and passenger windows are tinted but they seem to make this noise. The noise that I am referring to is like the windows are clicking or skipping off the track. Try it and you tell me if you hear it!!

 

As I said in the tint thread, this is a recalled part (window seal). Just take your car into the dealership and they should replace it for free...