Duette window shade won't roll up or down how to fix?

If your Duette window shade won't roll up or down, first check for any obstructions in the track or around the cords. Ensure that the cords are not tangled or caught. If the problem persists, inspect the mechanism for any signs of damage or wear; gently try to realign it. If these steps don't resolve the issue, consider contacting the manufacturer or a professional for repair.