I just learned something invaluable! If you ever iron the wrong side of interfacing on accident, you know how much goop gets on your iron. Yuck. Well, I just found the trick to take it right off! Dampen down a Bounce dryer sheet, place it on a towel and rub your warm iron on it. It takes the goop right off. Like nothing! Amazing. Just a thought for you to store away in the recesses of your brain for some day in the future.