I have tried many shampoos in my locs to determine what is the best clarifying shampoo for locs that will give us that deep cleansing action that we need periodically.
First, lets talk about what is a clarifying shampoo and how to effectively use them in your locs. Clarifying shampoos are meant to deep clean your hair/locs - removing all dirt, oils, products and debris. However, clarifying shampoos can be quite harsh on the hair leaving it dry and brittle but clean. Because of the drying effect, I highly recommend following up with an oil rinse or a moisturizing shampoo. If you use conditioner in you locs, then you can go straight to conditioning.
Sadly, not all clarifying shampoos are made equal and thus not all effectively clarify the hair/locs. I have tried many different clarifying shampoos that leave my hair dry and feels squeaky clean but I can clearly see that it is still dirty. Even shampoos that I swore by when i was loose natural and even in the first few years of my loc journey, is simply not effective anymore on my matured locs. I needed a shampoo that would penetrate the locs and clean it inside out.
For me, that shampoo is Neutrogena Anti-Residue Shampoo. This product gets deep into my locs and remove all product, oil and dirt from my locs and scalp. I have scalp eczema so, ensuring that I maintain a clean scalp is very important. It lathers really well and you do not need a lot to get a clean head of locs/hair. After one or two shampoos, I follow up with either a moisturizing shampoo or a diluted conditioner.