Have you tried to iron a small sample of the "clingy" fabric? To me, it doesn't sound like you can iron it, and if you can't, then starch isn't going to help you. For starching, I get the concentrated bottle and mix it 50/50 and put in a spray bottle. I spray the fabrics I'm planning on using and let them "sit and soak" for at least 2 hours, then I either air dry or put in the dryer for a few minutes, then press.