I just can't get it off. I have tried all the window cleaners and nothing really works. Some work better than others but nothing does the job. I have used rubbing alcohol with some very very light rubbing with 0000 steel wool and that had worked the best. I have used the bug off cleaner you get at Wal-Mart in the green gallon jugs but it just makes it worse. The cleaners that have no bug off doesn't leave as bad of film. So what have you tried that has had decent results.