Its not that hard. Go buy a pack of strait razors, and a spray bottle. Spray it down with some water and a mild detergent and start the scrape process. Start from the top of the window and move down, keep the razor on the glass with a steady amount of pressure. You definetely want to use the soap as when the glue gums on the blade of the razor, and you move it up or down on the glass, it could get all over your interior, and cause a sticky mess. With the soap it helps clean up easily.