Oh really? Huh. Did they give any tips on what you should use? I thought bulletproof glass was glass with plastic sandwiched in with it (and on the outside). I wonder if a non-ammonia glass cleaner would be ok.
I think Lexan is what's used in banks and such, but that stuff is like an inch thick.
I think they told him just to a mild soap and water with a MF towel. I am not totally sure cause I was asking for someone else. I will ask him Monday though.