If not using distilled water, boil water for a few minutes and then allow to cool.
In a medium-sized bowl, combine all of the ingredients and stir well.
Add essential oils and stir. I like to use citrus oils (like lemon) because it is tough on grease.
Notes
Vegetable glycerin is optional. It gives it more sudsing power while also helping moisturize your hands.Sals suds is different than castile soap and cannot be used interchangeably in this recipe.