I have a huge window in my shower, and in the winter it is freezing. It's made worse because I'm in a basement level apartment, so the snow piles up against the window. I want to put something on the window to insulate it a little, but I'm not sure what. I'd thought about putting a towel on a tension rod, but I'm worried that will mildew. I'd thought about that stick on plastic stuff, but I need to be able to open it to let moisture out because we don't have a fan. I'd be satisfied with just covering the lower part. Will contact paper do anything? I need something water resistant, and non permanent. Any thoughts? Thank you!
Here's a picture: