Thanks everyone for replying. I made up a spray bottle of 1 part Sta-flo and 2 parts water and tried it out on a piece of fabric I needed to use today. I sprayed it till it was very damp (on back side), waited about 7 minutes then ironed the front side. It worked wonderfully and I really like the results. Far superior to what I was getting using Best Press.
How long can I keep the solution I mixed up today? I've got about 1 1/2 cups worth. I didn't see any directions on the jug but I think I've heard here that it will only stay usable for about a week. Is this correct? If so, I'll have to start in on pressing my fat quarters now so it doesn't go bad.