Then I had a "duh" moment and realized I could use citric acid! I found it at my local health food store for $2.10/four ounce bag (1/2 Cup) - I dare say it works better than the commercial detergent I was using! I haven't broken down the total cost, but I'm pretty confident that it works out to be around around $5 for 100 loads (about $0.05 per load). I will post the actual breakdown and the price comparison to what I was paying for my generic commercial detergent later.
- 1 Cup Borax
- 1 Cup Washing Soda (sodium carbonate)
- 1/2 Cup Citric Acid
- 1/2 Cup Kosher Salt
Add one tablespoon to the detergent cup.
I put the detergent into an empty Vegenaise jar (like a mayonaise jar) but any plastic, glass, or cardboard container will do. I also keep a tablespoon measurer in there that I got as part of a set from the dollar store - that way I never have to search for a proper measuring spoon and I don't have to worry about reusing it for a food item. If you are unsure of what washing soda is or where to find it, please refer to my post about homemade laundry detergent here.