How To Make Dry Shampoo Remember it's important to use natural ingredients when you make dry shampoo. Dry shampoo is typically used to replace a hair wash. It eliminates oily hair and removes dirt buildup. It makes your hair appear cleaner and helps hold hairstyles in place whilst adding extra volume. 1. Dry shampoo recipe: You will need cornstarch, baking soda (use for light hair) or unsweetened cocoa powder (use for dark hair), and peppermint essential oil. Pour 5 tablespoons of cornstarch into a jar then add 2 to 3 tablespoons of baking soda or cocoa powder. Next, add 3 drops of peppermint oil into the mixture. Mix everything with a brush. The dry shampoo will last for 2 months as long as it's stored in closed jar. 2. Using dry shampoo: For optimal use of the homemade dry shampoo, you should apply it on the roots and on your scalp. Leave it for 2 to 3 minutes and massage for better absorption. It's recommended that you do not use it daily because it could irritate your scalp and cause hair loss. It's still necessary that you wash your hair 2-3 times per week.