Over the years I have used many brands of spray starches in my sewing room. Being I tend to go through a lot of starch how well it works matters to me more than most. Most starches work but some leave white flakes on the fabric which takes away from the nice crisp look we want when using startch. Worse yet some leave residue on the iron. Then, the next time you use the iron it leaves nasty brownish colored stains on your light colored fabrics. With Faultless Professional Heavy Starch I don't have those problems. I spray it on the fabric, wait a couple of seconds and iron. No white flakes and no yukky dried residue on the iron or the fabric. Finally I get only positive results from a starch!