Fill your jug about halfway with hot water.
Add washing soda, baking soda, and Epsom salt. Stir until smooth and slightly bubbly.
Let it cool for about five minutes.
In a small cup, mix your essential oils with polysorbate or a bit of soap — this helps them blend instead of floating.
Once the base has cooled, pour in your Sal Suds or Castile soap.
Add your essential oil blend and stir gently to combine.
Top off with the rest of your warm or room-temp water and mix again.
