I use the Purity laundry liquid on my nappies. I soak my nappies in water with a bicarb soda and tee tree oil solution, then wash with half the amount of washing liquid then hang the ones that are still stained in direct sunlight. The only time I got stains that wouldn't come out was when I gave dry pailing a try. Don't know why I had problems but I did - maybe I didn't wash them soon enough? Anyway - HTH