Homemade PBW The ingredients are: 1. Seventh Generation Powder Dishwasher Detergent, Free and Clear (available at Target and Walmart) 2. Red Devil TSP/90 (available at Amazon) 3. Oxy-Clean Versatile Free (green lid, make sure to get the "free" one that has no dyes or perfumes). Here is the ratio to make a small tub. To make a larger quantity, just increase in an equal ratio: 10oz 7th Gen 16oz Red Devil TSP/90 24oz Oxyclean Free So if you want to make a double quantity, for example, it would be 20:32:48. To do this, just purchase a larger quantity of the Red Devil (they sell it in 4lb bags on Amazon as well). That will use your entire 3lb tub of oxyclean and you will have plenty of Red Devil and 7th Gen left over for future batches when you get more oxyclean.