Put about 1 teaspoon of an emulsifier like Diatomaceous Earth, bentonite clay, collagen, or gelatin in a small glass container.
Add essential oils to the emulsifier.
Add the filtered water.
Blend the emulsified mixture into the filtered water.
Put some of the mixture into the filtered water.
Put some of the mixture on your fingertips, then masssage into scalp.
Keep mixture in a covered container in the fridge and discard after 4 days or so.