The hair dryer doesn't get it nearly hot enough to be a problem. You have to worry about puncture, exposing the lithium to air so you don't want to poke or bend it. I slowly heat and lift and in a minute or two it just comes up like it's stuck with old gum.

It's much cleaner than trying to use chemicals and safer than trying to wedge/cut. I don't know why more people don't know to do it this way.