Secure a suction handle to the bottom edge of the rear glass, as close to the edge as possible.

If your rear glass is badly cracked, covering it with a layer of clear packing tape may allow the suction cup to adhere. Alternatively, very strong tape may be used instead of the suction cup. If all else fails, you can superglue the suction cup to the rear glass.

Lift the rear glass with the suction handle to create a small gap between the glass and the frame.

In case you have trouble creating a gap, apply more heat to further soften the adhesive. Follow the iOpener instructions to avoid overheating.

Insert an opening pick into the gap.

Slide the opening pick to the bottom right corner to slice the adhesive.