I managed to get some Wonder Under on the sole plate of my iron. However, I discovered once the iron was completely cool, I sprayed it with my trusty cleaner....Krud Kutter..... I let it 'soak' for a second and wiped up the 'extra runs' while I waited. Then I used my fingernail to scratch off the excess Wonder Under. I was amazed at how easy the Wonder Under came off. Hope it helps someone else too.