Dry Lube PTFE Spray. I got this: https://smile.amazon.com/dp/B00AF0ODGM?psc=1&ref=ppx\_yo2ov\_dt\_b\_product\_details
I've had a couple of service people tell me the same thing - lubricate both the track and the panels themselves. I use a mixture of two things in mine and it's never had issues:
This for the tracks and the panels... (any dry lubricant will work in the tracks)
https://www.amazon.com/gp/product/B00AF0ODGM/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1
Use gloves and try not to breathe it. I try to be sure and spray it inwards at the seams/edges.
and 303 as extra on top of the panels.