I have a Cole Sewell storm door with a full pane that swaps out between glass and screen. This year, the glass has warped slightly--one of the joints is slightly expanded, enough that we can't get the glass out of the door frame. It's very tight but I'm afraid to force it out as I don't want to break the glass.
Glass does not warp. Most likely either the frame or door has warped, or the glass was not placed into it properly. It would take a lot of force to break tempered glass, unless you hit it sharp on the edge, then it breaks into millions of little pieces.
__________________ Ren: Now listen, Cadet. I've got a job for you. See this button? Ren: Don't touch it! It's the History Eraser button, you fool! Stimpy: So what'll happen? Ren: That's just it. We don't know. Maybe something bad, maybe something good. I guess we'll never know, 'cause you're going to guard it. You won't touch it, will you?