The verticle track should be removed & cleaned spotless,, you can leave the horizontal track in frame and clean it very good .I used a claw pick up and screw driver with cloth on end to clean horizontal track...I used wheel bearing grease ,,but a lighter grease would be preferable ,, the secrete seems to be CLEAN the tracks,,my verticle track is a bit tight (to avoid rattles) but the window goes up or down in 5 to 7 seconds,,,,,,about 5 seconds if I,m moving on the highway of life,,I have a powerful battery ,,sure that helps
Before I installed DIY stu excellent wipes & clean & lube it was 12 to 14 seconds..
Lubri plate(white grease) would be the best lube,for a window track, but few would have it,,or buy it just for this.. long term you should have a light grease ,,grease eats dirt better than oil coating,,oil is better short term and if you clean track every 4 years...
[This message has been edited by uhlanstan (edited 10-06-2009).]