This method uses washing soda which helps soften water and reduce odor.
Heat water in a pot over medium heat.
Mix washing soda and baking soda until dissolved
Add the castile soap, mix until blended.
Transfer to a jug. Shake well before use.
Use 1/2 cup per load. If you have a HE washer use 1/4 cup per load.
This method yields 15 loads.