When your iron gets all gunky, it's because when you ironing the starch, instead of ironing the fabric.. I starch every piece of fabric I'm going to work with, at least 2 hours ahead of the time, throw it in a plastic bag, and let it sit, then I'll take it out, either line dry or throw in the dryer for a few minutes, then iron, have never had a problem with the iron getting all gunky then, I do spray mist with water since I don't use the steam on my iron. I use the Sta-Flo and mix 50/50.