Lubricating window runners- What to use?

[carreauchompeur]

Folks,

The front windows on my E36 M3 Cab are sticking slightly, not a big issue but does stop them going up "automatically" which is a pain. There is a pronounced squeak from the driver's side so I'm hoping lubrication might do the trick before mucking around with regulators, etc.

What should I use?

I have seen some Gummi Pflege on eBay which seems decent stuff too- Is this just a protectant?

[carreauchompeur]

E30M3SE said:

There's no top door frame on a e36 cab, only the seal on the b pillar and the seal on the soft top. If it's squeeking then it against the b pillar seal, if the windows aren't working on the one touch when going up your windows may need an alignment tweek as they are too tight against the b pillar seal or it maybe the motors, as they are torque sensing and stop for obstructions.

Fair point... Might give that a try, however it might be catching on the rear runners?