In April of this year I posted about home made spray starch. I am pleased to report that it works quite well. There isn't any sticking or flaking, but I must admit that I usually am ironing with steam. I find that I get a better result with steam, and ironing lines in just always come out just the way I want them. By lines I mean what people used to do down the front of their slacks (I don't iron seams / lines down the front of my pants- they never even see an iron!)
The one drawback is that with all this HOT weather the nation seems to be having the starch may begin to smell a bit unpleasant and you do not want to iron in bad odors to something beautiful that you are making - so smell the starch first. And yes I did add some borax to the solution to preserve it. So now the starch is kept in the refrigerator with a nice label on it "STARCH". It also washes out quite nicely without damage to your machine.
So give it a try - I'll bet that you have some corn starch in the kitchen cupboard - add some cold water to dissolve the corn starch - bring to a boil while stirring constantly to avoid lumps - allow to cool before funneling into a spray bottle. You can use it immediately, store any unused portion in the fridge and make sure that you label it.
*Note you don't need much corn starch in the water - opt for less rather than more. A half teaspoon to a pint of water is a good start. If you find that you require a heavier starching add only a quarter teaspoon more mixed with a tiny bit of water to the main solution. Add the borax to a small bit of water - then mix into the boiled starch.
I hope that this was helpful, it certainly is economic. .