Use razor blades and plenty of Windex or whatever brand glass cleaner. The razor blades will remove the tint layer then the Windex eats at the adhesive which is then also removed by the blades. It makes a big mess but it is not to hard.
Tim, I've removed tint from every Land Cruiser I ever owned (can't see out the back on the trail at night), and tried several different variations. The one that worked the best for me was using those flat razor holders with the slide button, plenty of fresh razors as ForestCam suggested, and Goop! (in spray form is easier) sprayed liberally over the remaining glue. It's a PITA but can be done in a couple of hours.
Heat it up with a heat gun, then get an edge up with a razor blade. Grab the edge, and pull it right off. Even works for rear windows with defrost grids. Follow up with window cleaner and 000 steel wool to remove any glue left behind.
A forum community dedicated to custom off-road vehicle owners and enthusiasts. Come join the discussion about trail reports, builds, performance, modifications, classifieds, troubleshooting, fabrication, drivetrain, and more!