Hahahaha that's great....and that's why they get paid the big bucks. I have not tried the heat. Currently my pop up is up and the entire top of the window is unzipped/ ripped all the way to the sides. With it like that, it is just barely Velcros to the door. Either way I have approximately two feet of ripped vinyl from zipper that would have to be fixed. I am going to work on it Saturday as Sunday it's supposed to rain. Struggling to get it done..... tired at 8 1/2 months pregnant. My windows are also yellow but that is because I have been using pledge to clean them for many years... lol, but they are not brittle in the least, they are actually just like feeling new windows. The RV show is coming up in a couple of weeks in Tampa Bay, I am going to try and go just to check out what's new . I will try the heat and let you know.