I tend to be fairly rough on my gear and always have a screen protector on my back screen. But every brand of glass screen I have ever tried start delaminating in the upper left corner, where I usually pull the screen out. I am guessing that the screen forced enough and eventually oeels of the protector. Thinking of trying PET film next. I never use the touch screen anyway.
Surprising, but they seem to be the only PET game in town. Vello has a film too. Given how common they are for phones I am surprised we don't have more choices. Volumes are probably too low.
I exclusively use and recommend expert shield. They’ve been great over the last five years, but they do have several varieties. I prefer crystal clear myself.
I have used GGS Larmor Optical glass screen protectors in the past and have found them quite good. Haven't got around to applying anything to my latest bodies.
I use amFilm tempered glass protectors exclusively. They are clear, don't interfere with touch operation, and actually protect the screen - I once hit the rear LCD of a camera and the amFilm cracked as expected and protected the LCD underneath it.
