Once you confirm the presence of hard water, you can focus on incorporating products specifically formulated to combat mineral buildup into your routine. The most common weapons against buildup are shampoos fortified with chelating agents. Chelating agents, of course, work best when there are minerals to battle. If your water is not actually hard, they can actually act like a clarifying shampoo and disrupt your hair routine.
We're often asked about the difference between clarifying shampoos and those containing chelating agents. Put simply, a clarifying shampoo combats the buildup resulting from product (ie. residue from styling products), and chelating shampoos combat mineral buildup (such as calcium, magnesium, chlorine etc.)
While clarifying and chelating shampoos can be great for keeping your strands clean, it's important to consider the holistic profile of your hair. Factors such as porosity and cuticle condition dictate the frequency with which you can use them, if at all.