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.

Look for binds. You may need to smooth some edges with fine sandpaper. You should not need to lube.
Good luck
UH