Take a black trash bag and cut the bottom out and one side.
Wet down the outside of the window with water and layout the trashbag and move all bubbles out under the trash bag.
Trim the trash bag just a little bigger than the window.
Open the hatch and spray 409 or Simple Green throughly on the inside of the glass.
Take the black trash bag and now place it on the inside (matching up the corners as they were on the outside) Smooth out the bubbles as before.
Sit it out in the sun on a 70 to 80 deg day for 30 mins. Pick at one corner to see if it will start to pull off. If not, spray 409 or Simple Green again and let it sit for another 20 mins. Just make sure that it doesnt dry out.
Once the film peels off, the film should come right off with the glue but since its peeling a little bit, the film might come off in layers.
After all the film is removed, take a blue scrub pad or chore boy with 409 or Simple Green to scrub off any glue that was missed.
John Martin
1986 Buick T-type
6.21 @ 112
9.71 @ 140