I have a tri fold cover over the rear cargo box and the problem is that it freezes to the area where the tailgate contacts it in the up position and I cannot open the gate. It also freezes along the top sides where it contacts the rails and I cannot fold the cover. At the moment I just have left it open so that I can have access to the rear box. I have tried a silicon spray and that did not do anything. Is there a solution to this?