I love the Stay-Flo. I keep my spray bottle in the refrigerator.
It works better if you:
1. spray and let sit a few seconds to soak in.
2. use it hot: either use hot water to make it, or iron the fabric and then spray.
3. spray the entire piece and then iron. (It's all soaked in by then.)
4. dunk entire piece of fabric into diluted starch, let it dry and then iron.