The girls at work have given me a recipe for homemade laundry soap. You mix 2 cups Arm and Hammer Washing Soda, 2 cups Borax laundry booster and take 1 bar of Fels naptha soap and grate it and mix it in with the above two ingredients. You use 1 tablespoon of this mixture per load of wash. I was sceptical at first but they gave me some to try and it really cleans your clothes. I would be curious to see what the Duggars use. the boxes of Arm and Hammer and Borax make about 3-4 batches so you would need 3-4 bars of soap. I keep it in a closed rec ycled 5 gallon ice cream plastic container.