Laundry Sauce Recipe Concentrate:
You'll need 1 5.05oz bar of Fels Naptha Soap, 3 cups of Water, 1 Cup 20 Mule Team Borax Powder, 1 Cup Arm and Hammer Washing Soda -not baking soda, and 2 1qt Mason Jars. Plus an old school blender - my ninja doesn't work! :(
Day 1: cut your Fels Naptha soap in half and then in to smaller chunks. Place half in one jar and half in the other. Now add 1 1/2 cups of boiling water to each jar. Cover and leave overnight.
Day 2: Loosen the jell that the Fels Naptha bar made with a butter knife. Add 1/2 cup borax and 1/2 cup washing soda to each jar. Add more hot water to the jar so the contents reach just to the shoulder of the jar. Right as it starts to taper. Next you'll be using your jar and the base of your blender. Seat the gasket and blender blade onto the bottom of the jar. Add the blender base and whip until light and fluffy. Just like mayo!
One tablespoon of sauce in every load works as your detergent and if you have a stubborn stain, even grease, dab it on and give it a gentle rub. Wash like usual and you'll be amazed at what it can get out! Let's just say it has saved many shirts!!
I know there are several other methods. This is the one I have used for a few years now. It's only $1 for the bar each time and the boxes of borax and soda last for a long time! After the 2 years I finally had to buy more washing soda the other day. I'd say each jar is 128 loads and is about $3 at most.