Heat up the glass for 3-5 minutes. I chose to do it for 4 minutes.

You only need to use your heatgun on the lowest setting. I wouldn't recommend using a hair drier as it doesn't get very hot.

You must be careful when using the heat gun on this device. If the device is heated up too much then it may melt the digitizer and cause discoloration. If you start to see any discoloration then shut off the gun immediately.

This procedure softens the adhesive that holds the glass to the screen assembly.