duster rear window rubber wavy inside

Thank you Pauly , that was a fast reply. I will wait and colect more data on this , I ve got at least a month before it gets nice enough to drive the car. Also the waves to me indicate that the rubber is too long , now is the heat going to shrink the rubber(like shrink wrap tube for wires) or is it going to make it longer(hence worse)???Usually heat causes expansion!