Question: what is the best shampoo for removing build up?
Answer: Christophe Robin Clarifying Shampoo., Pureology Purify Colour Care Shampoo., Bumble and Bumble Sunday Shampoo., L'Oréal Professionnel Serie Expert Instant Clear Shampoo., System Professional Purify Shampeeling., Moroccanoil Clarifying Shampoo., Joico K-Pak Clarifying Shampoo.