Start by measuring the bentonite clay and add to a non-metal bowl.
If using any carrier oils, mix them in with the clay now.
Then, add your water or apple cider vinegar and stir the concoction using a wooden or plastic utensil.
Let the mask aerate for a few seconds.
Stir really well until the consistency is yogurt-like.
If you feel like the mask is too thick, add a little bit more water. If it's too thin, add a little bit more clay.
Saturate wet or damp hair and leave on for 25 minutes. Rinse out while massaging the scalp, and follow up with shampoo and conditioner.