According to the New Zealand Dermatological Society, the oil on your scalp is a combination of sweat, environmental substances and sebum -- a naturally produced body oil. Instead of slipping on a hat or scarf, eliminate excess grease and oils from your hair with a homemade dry shampoo.
Cornstarch and Baking Soda
Combine 1/2 cup cornstarch and 1/2 cup baking soda in a medium-sized bowl. Stir the powders together and add 2 to 3 drops of your favorite essential oil.
Dip a large makeup powder brush into the mixture and work it into your scalp. Continue until your roots are lightly coated with the cornstarch and baking soda mixture.
Allow the mixture to remain on your roots for 5 minutes. Work a brush through your hair to remove the mixture, along with the oils and grease on your scalp. Store the leftover dry shampoo powder in an airtight container.
Ground Oats and Baby Powder
Pour 1/2 cup unflavored rolled oats, not instant, into a food processor. Grind the oats until they are the same consistency as flour. Combine ground oats and 1/2 cup of baby powder in a medium-sized bowl. Add 1/2 teaspoon of lemon or lime juice to sweeten the dry shampoo's odor.
Cover your scalp with 2 to 3 tablespoons of the mixture. Pay attention to cover your entire scalp. Work the powder mixture into your scalp with your fingers and allow it to sit for 5 minutes.
Work a brush through your hair to remove the mixture. Store the remaining dry shampoo in an airtight container.