BED HEAD dirty secret dry shampoo 300 ml BED HEAD dirty secret dry shampoo 300 ml is a dry shampoo designed to absorb excess oils and refresh hair between washes. It is formulated with tapioca starch to absorb oils and a light fragrance to leave hair smelling fresh. The product also contains lightweight polymers to help hold up the hair's style and texture. The product is suitable for all hair types and is designed to be used on both dry and damp hair.