Without a doubt, oily hair's best friend is dry shampoo. This product not only refreshes hair between washes but also lifts the root. There are several formulations on the market, but we recommend a detoxifier. Our favorite product is Dove Detox & Purify Dry Shampoo . This product absorbs quickly and you can use it two consecutive days. It should be noted that the dry shampoo was designed to be used between washes and not to replace liquid shampoo. This product leaves no visible residue and absorbs the bad odor of the oily scalp.