I've been using this "recipe" for laundry detergent for about a year and haven't noticed a difference - other than it's much cheaper than buying it at the store!
1/3 bar Fels Naptha (or Ivory)
½ cup washing soda
½ cup Borax powder
2 gallon size bucket
Containers in which to store
Grate the soap and put it in a sauce pan. Add 6 cups of water and heat it until the soap melts. Add the washing soda and the Borax and stir until it is dissolved. Remove from heat. Pour 4 cups of hot water into the bucket. Now add your soap mixture and stir. Add 1 gallon plus 6 cups of water and stir. Let the soap sit for about 24 hours and it will gel. The finished soap will not be a solid gel. It will be more of a watery gel that has been accurately described as an “egg noodle soup” look. I then store mine in 3 96oz. juice bottles. Use ½ cup per laundry load.
You can add ½ teaspoon essential oil if you like for fragrance or 1 cup of your favorite fabric softener or 1 cup of Oxi-Clean as a cleaning booster.
Fels Naptha, washing soda, Borax and Oxi-Clean can all be found in the laundry aisle at the grocery store.