This post will explain, step-by-step, how to wash your hair using the baking soda and vinegar method. If you are currently suffering from scalp irritation from using regular store-bought shampoos, this method of washing your hair should give you some scalp relief. Please note that if you have inflamed spots on your scalp, using this method may cause a slight burning sensation in these areas. This is normal and will eventually stop once your scalp heals.