I can go a week between washes with this product alone. I reach for the advanced clean dry shampoo more often than Phd, but both work WONDERS. The key is to make sure you shake it before each spray so you really mix all the ingredients together! This is a recurring purchase for me + something I like to bring for white elephant/gift exchange as it’s always a hit! Who doesn’t love a practical gift?! If you purchase the 7oz PhD, you’ll receive the travel size Advanced clean for free from ulta! *while supplies last!* stockingstuffer livingproof dryshampoo LTKGiftGuide LTKbeauty LTKunder50