To add to what drjayo posted...... Start at one end and work to the other end until the piece is all of the way off. Do not work from both ends inward. You will bow it. The plastic popscicle stick worked best for us. Don't be afraid to use a slight amount of leverage/pressure to get it between the roof rim and the trim. Oh, and you will bend the underneath lip of the trim some. Not to worry. It straightens easily and no one will know.