Measure 3 tablespoons borax and 3 tablespoons washing soda into a glass measure. I like to use one with a spout. Mix together well.
Using the funnel, pour into 1-gallon jug. Add 3 tablespoons soap.
Add 4 cups boiling water. Swirl mixture around gently, or mix with a spoon. Then fill to the top with cold water. It will bubble up and it will also be quite runny.
Measure 3 tablespoons borax & 3 tablespoons washing soda in a 4 cup pyrex glass measure. Mix.
Add 2 cups boiling water. Mix.
Add 3 Tablespoons soap. Mix.
Divide this mixture evenly into each 1/2 gallon jug, using a funnel. Add 1 more cup of boiling water to each jug.
Fill each jug to the top with cold water and gently turn upside down & right side up to combine.
Makes 1 gallon