I found this tutorial a while back about 3 years ago and now I thought it was worth sharing here. The source will be posted on the bottom. I believe this will save all of us some money that we can use for other things.
Liquid Laundry Detergent Recipe:
What you’ll need:
*Box of Borax Natural Laundry Boost (this can be found in the laundry soap aisle)
*Box of Arm & Hammer Washing Soda (baking soda will NOT work as a substitute)
*1 bar of Fels-Naptha soap, a stain removing laundry soap (ANY bar of soap like Ivory, Dove, et. will work, but we like the extra stain-fighting in this one)
*Scented oil of your choice (optional)
*Five gallon bucket
*Empty laundry detergent bottles or milk jugs
Instructions for 5-gallons of liquid detergent:
1. Grate your bar of soap with a cheese grater. Careful, the Fels-Naptha soap really looks like cheddar cheese–kids will want to eat it!
2. Put the grated soap in a sauce pan with 6 cups water. Heat soap and water until the soap melts.
3. Add 1 cup washing soda and 1 cup Borax and stir until dissolved. Remove from heat.
4. Pour 1 gallon hot water into your 5-gallon bucket. Add your soap mixture and stir well. Add about 3 1/2 more gallons of hot water to the bucket and stir again. Add your scented oil now if you choose to. We used about 2 tsp. honeysuckle essential oil. Just add enough until it smells good to you.
5. Pour the liquid mixture into your empty bottles (you might want to try a funnel). Or, leave it in the 5-gallon bucket–it will just be a little more difficult to use. Let the mixture sit for about 24 hours. It will thicken almost to a gel.
6. Shake your bottle well before each use. Use 1/2 cup of detergent for large loads.
The Arm & Hammer Washing Soda was about $3 to $4, and the Borax about the same price. The Fels-Naptha bar ran us about $1.25. You will get about four 5-gallon buckets of laundry detergent from one box of each. With tax, we figure that works out to be about $2.50 for 5 gallons. Sweet! That could cover about 160 loads of wash! You can’t get a better deal than that.