I'm very gentle with glasses, may I start.
I was cleaning my prescription glasses, when not only did the lens pop out of place, but the frame broke! I was using pressure lighter than I normally use because I dont use this brand (I usually go for Ray bans). Its impossible to get the lens back in place, and the frame will not melt enough to become sticky! I can live with it but this should not happen with glasses that cost more than $200CAD