To make dry shampoo at home, combine one tablespoon of salt with 1/2 cup of cornmeal. Add the mixture to a shaker bottle, then sprinkle into hair roots. Dirt and oil attach to the dry shampoo particles and are removed through brushing.
Baby powder makes another effective dry shampoo. Simple apply to the hair roots and brush thoroughly. Some users prefer to add cornstarch or baking soda to the baby powder.
Another waterless method for cleaning hair requires only a piece of cheesecloth. Wrap the cheesecloth around a wide, natural bristle brush. As you brush your hair, dirt and oil adhere to the cheesecloth.