I have used Goo B Gone to take off the sticky stuff. It works with a little elbow grease and I was impressed that it left no sticky residue at all. My iron was warm when I did this, but I think it would work on a cool iron. After everything was off, I cleaned the iron plate with warm water and a paper towel. And I ironed on some scrap fabric just in case. Nothing showed up on the fabric after the ironing. Oh, I did try the old salt on a paperbag trick. Didn't work. Just glued salt to the sticky stuff on the iron! LOL! But the Goo B Gone took that off too!