Removing Tape and Stickers from Glass

When trying to remove old, very stuck, masking tape or stickers from glass or even appliances, my favorite aid is simply vegetable oil. I soak on this great non-flammable, non-toxic oil and keep putting on more until it manages to soak into the tape and reactivate the glue. With everything softened up, you can now easily scrape off the sticker and then clean the oil off the window with regular window cleaner.