Dritz makes an iron cleaner. Comes in a tube like toothpaste. Squeeze out about an inch onto an old towel and wipe your hot iron over it. Then turn the towel to a clean spot and wipe the residue off until you can no longer see it. It will smoke but really cleans the bottom of your iron and makes it nice and slick. I get mine at JoAnn's when notions are on sale half price.