I went to Walmart and bought some soft pliable clear plastic. Cut it to fit, and used velcro to hold it in place. When we don't have it on the door, we roll it up and store in the closet.
Well this is strange, at least to me. Winterized the TT three weeks ago and today went out there to get something we needed and I found the glass shower door had shattered.
The only thing I can think of is that glass was cracked or defective and from the one of the freezes we just had made the glass shatter.