it’s also the one glass you can use to be compliant in every energy star zone – in a double-pane window. be sure to avoid them in order to fight this deadly (not really) and terribly annoying but highly common problem. please let me know if you solved this problem in another and/or more elegant way! they’re as small as possible get them. this will put them close to the jaw size for your piece, so you will not fumble around as much. 