All you need is a hairdryer! The heat from the hairdryer relaxes the heavy duty commercial adhesives that hold on the stickiest of stickers. After 45 seconds of direct heat, test a corner of the sticker and see if it peels away easily. If it doesn't, continue the hairdryer treatment for another 45 seconds or so. Then, start peeling off the sticker. For larger stickers, you may need to work in sections.