I use a dryer sheet often (like ctrysass) for basic keeping the iron clean. However, I'm not sure if it will do the larger job that you need. you could try the old standby of baking soda and vinegar on a cool iron (make a paste with baking powder and a tiny bit of water. put it on the iron, then spray some vinegar on and let it bubble. scrub it off with a toothbrush or sponge)