I have used this recipe for two years now and we love it. I use the gel version though (boiling the soap with water, adding the washing soda and borax, then the rest of the water). You can use different kinds of soap too. I usually use Kirk's Castile soap. I've never tried the grapefruit, but I put grapefruit seed extract in mine as a disinfectant and antibacterial. Someone mentioned vinegar for the rinse, we do that too. It's fun making home-made soaps! I make dishwasher soap too!