Just thought I'd share that I used sil-glyde on my driver side window channel to great success. Window goes up and down perfectly now. Key is pulling the panel and lubing the tracks that are hidden in the door. If you just lube the tracks that are visible, you'll not notice much difference.
Amazon.com: SIL-GLYDE LUBE COMPOUND--4 OZ. TUBE: Automotive
-b
Amazon.com: SIL-GLYDE LUBE COMPOUND--4 OZ. TUBE: Automotive
-b