What are you guys using to protect the windows from blasting on the inside? Mine has glass inside, plexiglass outside, and I had several sheets of thin plastic with double-sided tape that I used for protection of the glass. I've run out of sheets, and can't find anything to use that's reasonably priced. I bought a large sheet of mylar type plastic for $5 and it hasn't lasted too long. I only got one protector out of it.