How can I remove the window tinting from my car?

Anybody know a sure fire home remedy to remove aftermarket window tint? You know, the sticker stuff, not the factory tint.

I had to put a new door on my car and it has tint which doesn’t match the rest of the car. I can’t pull it off although it’s obviously a sticker of some sort.

Heat gun? Or would that break the glass? Adhesive remover? That could get really messy and damage the interior.

How do I get the tint off?