you have probs done yours now but this is what i done incase you havent..
i sprayed some fairy liquid and water onto the tints, wiped it around with a cloth / sponge. left it for a few mins, then peeled the top layer off slowly, doesnt matter if some of the tint gets stuck on, just get a stanly blade and more of your washing up liquid and scrape it all off. then clean the windows
sorry if thats hard to follow, im not a master of english