ok if you want the best way here it is. this will take some time and a hot day but take any spray with ammonia in it. this will losen up the glue. spray it on the window then place a back over the window so the spray does not evaporate. now you have to do this on a hot day when the sun is out the place it in the sun for about and hour then peal away. this is the easiest if you can't get your hands on a steamer. other wise if your tint has been on for a long time you will be pulling millions of small pieces off and you don't want to do that believe me
good luck