there have been some other threads about starch, some recipes for making your own, but I'm now using Sta-Flo which you add to water in your own spray bottle, instead of pre-mixed sprays, mostly b/c I was going thru cans so fast, this lasts me longer! I had trouble finding it, just kept on the lookout at every grocery store I was in.
I think once you start using starch & see how much it helps it's hard not to use it again and again and again, so quantity matters

JMHO
Florence