For me that´s Neutrogenas´Clarifying shampoo-clarifies very well but doesn´t leave the hair dry & flyaway afterwards

I almost forgot:George Michael´s Blue Shampoo is also a good option-it clarifies,but is quite gentle,so you could use it all the time.It´s one of my absolute favourites,one of the few shampoos I have been using for more than 7 years,always returning to it after my product experiments (The only other shampoo in this category is Paula´s Choice shampoo for me-and although it has no build-up at all,I´m not sure about clarifying)