Sticking can be from a few things, including the belt being too tight (and possibly too loose…).
I’d start fresh by:
- Use towel to clean the deck
- Use towel to try to clean the underside of the belt
- Lubricate with silicon, but not so much that it gums it up.
- Re-tension belt based on recommendation from Sole. I think typical is being able to pull the belt up a few inches.