The few times that I’ve cleaned my mirror the fit is so tight that it has been a struggle to get it out and then back in and properly seated. I posted here the first time it happened and it appeared that was just how it was supposed to fit.
Recently, I helped a student clean the mirror on our school’s Glowforge and was prepared for the worst but the mirror slipped out and in smoothly.
How am I supposed to know if my personal GF has a problem with the mirror? I worry every time I clean my mirror that the blue handle will pull off leaving my mirror stuck.