They don’t tell you this, but be careful with the picks when you are trying to separate the back cover from the chassis. It’s very easy for the pick to get between the backplate, which is really clear plastic, and the foil-ish lining that makes it look like sleek black glass- I’m sure the heat doesn’t help keep the foil laminated to the backplate. Then your only option will be to replace the entire backplate, or remove the foil-ish lining and let the back of your phone be au natural.