Thats another problem!

 

The Muz tube is best used when you're car is parked/garaged. It helps to eventually train your window to fold correctly so that you don't have to keep getting out of the car or carting the tube around everywhere you go.

It is made of a good quality velour covered rubber that always retains it's shape and does not warp like pool foam/tubing. It can be trimmed to fit many cars.

A towel across the back window will do absolutely nothing to eliminate creasing.

 

Muz- good point about "training" it - mine goes down perfectly 95% of the time!