If you’ve ever installed a screen protector on your smartphone, you know how temperamental the process can be. Everything starts off hopeful. You clean your phone and eliminate every speck of dust.

To protect a phone's display, or the screen on many modern tech devices, people often install tempered glass screen protectors — or use cases with similar screen protectors built in. They work great, ...

Pry up a corner of the protector with a knife, credit card, or similar object. Be careful not to damage your device! Lift the screen protector at least up to the bubble, or all the way, if you prefer.