the widow runners on the doors are dry, remove the door cards on the inside of the doors, lower the windows and spray with a silcon spray (the stuf to clean dashboards works) down the black window channels, where the channels are screwed to the door on the bottom loosen these screws a little, operate the window up and down a few time with the window down tighten these bottom screws and replace trim repeat on all window as required
Daniel leaney uk, October 2008