I starch , and use the Stay Flo concentrate , that way I can mix my own , and its much cheaper. I found use the cans of spray starch just got too costly. The only place I have found that carries the Stay Flo ( blue plastic jug) is Walmart.
Do let the starch soak , and or dry into the fabrics for the best results. Issues with flaking or sometimes even scorching come from trying to iron too soon after applying.