If the back case has already been removed, carefully place it on the WorkPad to protect the circuitry inside from the heat.

Using the hair dryer, slowly heat the edges of the device. Spend at least 1 minute on each side, thoroughly heating the case.

The LCD/Digitizer combo is very sensitive to heat, and can easily be ruined if it is directly exposed to the hair dryer. Verify that the screen is face down.