What lube for sticky window tracks?

[MrBeetleman]

I have a '99 m3 vert. The windows will go all the way up if I hold an individual button down, but the auto up causes the front windows to only go up part way & stop.
Several folks have suggested lubing the tracks that the windows travel in..
Does anyone have any more info? What do you use & how does it not get on the window? Etc....

[brian325ic]

I used spray rubber lubricant from Autozone. There is one made just for rubber and rubber seals, cost like $6.

Spay the hell out of everything, then the lube dries and you just clean it off the window with window cleaner.

[Toby B]

BMW will once again sell you their version... not OUTRAGEOUSLY pricy...

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