Apply a suction cup to the screen, as close to the center of the bottom edge as possible.

Pull up on the suction cup with strong, steady force to create a gap between the screen and the frame.

Insert an opening pick into the gap.

If your screen is badly cracked, covering it with a layer of clear packing tape may allow the suction cup to adhere. Alternatively, very strong tape may be used instead of the suction cup. If all else fails, you can superglue the suction cup to the screen.