When separating the digitizer film, keep something in between the LCD and the digitizer to prevent the heated digitizer from readhering itself back onto the LCD.

The next step is to clean the LCD and the frame.

The old OCA can be rolled off with a finger, after a small amount of heat is used.

The old double-sided tape can be cut and peeled off with a blade, and the remnants come off easily with isopropyl alcohol.