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Published on September 7th, 2021 | by Scott Cooney

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All natural DIY liquid laundry soap

Reduce your carbon footprint and any harmful ingredients with this simple recipe. Shipping all the liquid in a liquid soap uses a lot of energy, so getting the water locally makes this a climate win! 

1 bar castile soap
1 cup washing soda
1 cup borax
5 gallons water (for liquid soap) 

Directions: 

  1. Grate bar of soap with a cheese grater. This is not a necessary step – you can just skip to step 2, but note that it will take a lot longer and use a lot more electricity than grating the bar of soap first.
  2. Boil 1 quart water in a pot and add shredded soap. Stir until soap dissolves. Add another quart of water to dissolved soap mixture.
  3. Put 2 gallons hot tap water in a 5 gallon bucket. Dissolve borax and washing soda into hot water, then add the liquid soap mixture to the bucket. Add another 2 ½ gallons of water, stirring well. 

Use 1 cup for full load of laundry, ½ cup for HE washers, and adjust as you see what happens (individual results will vary).





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About the Author

Scott Cooney is a serial eco-entrepreneur including being the solo founder of Pono Home, HomeEfficiency.com, and CleanTechnica; author of two books; former sustainability consultant with clients including Johnson & Johnson, Eastman Chemical, Wal-Mart, and Duke Energy; former Adjunct teaching the first course in sustainable business in the MBA program at UH Manoa; lover of local, healthy food and especially vegan nachos. Find Scott on Twitter



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