Removing Rear window tint, How?

[[Tonko]]

--I wasnt sure what section to put this in, so if a mod knows a more appropriate place feel free to move it--

I need to get bubbly, crappy tint off the rear window of my car, I have scraped, peeled and none seem to be working very well...

Heating just made it stickier and softer which was harder to remove, even then its only in tiny pieces.

Tint-a-car suggested scraping off the demister bars, because thats what they would do
That method defies the point of removing it for roadworthy purposes..

The glue would be easy, just a bit of wax and grease remover gets it off.

Anybody have any suggestions that could work?

Or should i just get a new rear-window fitted?

Cheers, Noel.