I use the liquid Sta-Flo all the time but I sometimes add Vodka to it. I make it a gallon at a time and keep the leftover in the fridge so it doesn't get moldy. I dunk mine into a dishpan and wring it out using an old time wringer top as my hands just can't take trying to wring out up to 5 yards at a time. This solved the problem for me. Then I hang it up over my sink I have down in the basement until dry, usually wait till the next day most times. Then I mist it and then press it. Have never had my iron scorch any of my fabric and I think I have it set as far as the knob will go. I do try to keep the iron plate clean using that paste type cleaner that comes in a small tube. Haven't tried Mr Clean sponges yet, those white ones but as I have a good supply of them, I might the next time.
I also like my starch a bit stiffer so may use a amount a bit more than most.