That does work. I've used dryer sheets on my iron when I found out about it. My dh used to take it out to the shop and used steel wool. Now he doesn't have to do that any more.
I redid my poinsettia this morning. I decided it would look better if the bottom flower was in the middle. I was able to just pull it up and no residue stayed on it. I moved it over and ironed it down again and it stayed there. What a happy day!!