I have an approximately 11 year automatic pool cover that was made by Cantar (who is no longer in business). The cover has a history of working great and has held up well. Somehow the ropes that are used to open and cover the pool are severely tangled around the roll up tube. In fact, I can't even manually unwind the tube because somehow, the ropes are creating tension in both directions. Any suggestions on how to address this would be appreciated.

Kevin