On Monday, February 17, 2020 at 2:23:52 PM UTC-5, John Foster wrote:
What is the best way to lube the sliding window in a Mecaplex canopy?
Mine is a bit stiff, and I don't want to break it by using too much force.
It will slide, but stiffly.

Clean the tracks with wet soft cotton cloth (not paper towel).
Work the window back and forth, clean again, and get all the grit out.

What UH says (very fine paper!)