Question: how to wash hair with baking soda?
Answer: Step 1: Make a paste. In an empty shampoo bottle or small mason jar, mix the baking soda and water. ... 
Step 2: Apply to your locks. Step in the shower and apply the baking soda paste to dry or wet hair. ... 
Step 3: Rinse and dry. Let the mixture sit for one to three minutes, then rinse thoroughly with warm water.