Had a very obnoxious and loud squeaking noise from the passenger side window going up or down near the top of the travel. It sounded very much like rubber dragging on glass but had nothing to do with the weather seals. Pulled off the door panel (procedure covered elsewhere on this forum, but you will have 4 screws to remove prior to pulling the panel off, and be careful to align all the pins visually to the sockets when you reinstall). Turned out to be the rear regulator slider and track, which I lubed with NAPA Sil-Glide and now smooth and quiet. Tricky because the sound was not at all what you would expect from a nylon slider and aluminum guide. The guide is to the left in the opening in the photo.

 

Where exactly did you spray the lube? I'd like to try that on my door windows. Can you put arrows on the pic?

 

I think that once you open it up it will be fairly easy to see where. If you click on the jpg to zoom the photo you can see some of the Sil-Glyde grease (not spray) on the track where the nylon guide slides. Might be good to put it on the vertical guide on the right also, I had put it there first when I was trying to dial in where the noise was coming from (surprisingly difficult to pinpoint the source).