What kind of lube would be best to use for sliding rear window tracks?

My rear slider doesn't open as smoothly as I'd like it to. What would be a good lube to use for the rubber/plastic tracks that the pane of glass slides along?

I want to use something that's not going to degrade the rubber/plastic over time, and something that won't gunk up over time or cause other problems.

Triflow? Synthetic grease?

 

A graphite lube. Careful application of a colloidal, brush-on would work:
http://www.p-b-l.com/pbl2002/Neolube2.html
I don't recommend the dry stuff. There is a spray graphite from the PB Blaster guys. I'm having gool luck with it, so far, on my clutch pedal squeak. It's messy to apply though.

 

LPS 1 or LPS PTFE dry-film lubes are commonly used in aerospace applications. Stick a straw in the nozzle to limit spray area. An aerosol can is about $10: http://www.tooldex.com/product/LPS-02616/LPS-02616-Dry-Film-PTFE-Lubricants/

 

I like that stuff, unless it's outdoors. I never had any luck with it on my hitches, kept washing off.

 

Vaseline... Seriously, just a light wipe and your golden.

 

You beat me to it

 

Ballistol

I had this problem last year and this worked well for me.

Motoretro

 

Tears make the best lubricant.