now you have to heat up the screen using a heat gun or hairdryer.

use the hair dryer or heatinggun not to close to the screen ( +- 15 cm from the screen and go up and down. )do it 2 min , stop and see that the adhesive is coming loose.) if not repeat this step.

Use a spudger and "peel" or "slide" the spudger under the digitizer, watch out for the lcd screen). Once you're under the digitizer use a credit card or plastic cards to slide between the adhesive and the digitizer. If the adhesive is still to hard , heat again.

The guys of smartfastfix ( youtube) link : https://www.youtube.com/watch?v=QLNTUO-f... did a well job on this.