Sticky side windows

Some people use white lithium grease and that worked for me, but after replacing the window welts I didn't want to goop up the new ones.

I applied UHMW anti-friction tape to the edges of the windows while they were out of the tracks. The tape is on both sides and wrapped around the leading/trailing edges of the upper & lower frames, in hopes that it would prevent gouging the welts. So far it works great... maybe too good... I have to really tighten the thumb screws to hold the windows closed!

The tape is milky white and translucent. I used .75" wide tape and it's barely visible outside the welts but not noticeable unless you're looking for it. 

www.amazon.com/gp/product/B07CNRBQYZ/ref...n_title?ie=UTF8&th=1

I have a Forney with windows that are unbelievably difficult to slide up or down.  Is there something, like silicone spray, that I could add to the track to make them move more freely?