I had a homemade window cling stuck to my dining room window for like 10 years. Over the years i have tried everything to remove it to no avail. I used the Krud Kutter Cleaner/Degreaser, a razer blade, scraper, and elbow grease and it finally came off!!!! My problem is that now I have Krud Kutter streaks all down my window and I can't get that off! Windex definitely makes it worse. I have tried dawn and now vegetable oil. Help!!!