Using a heated bed (or the iOpener), heat up the device's adhesive for 2 to 3 minutes.

If using a heated bed, set the bed temperature to 80-85 degrees Celsius.

I don't own a heated bed for device repair, however my 3D printer's heated bed worked just fine. - Editor

I used a wet towel in a bag, microwaved open and then closed, set on the device. - Editor