Use a Good Clarifying Shampoo
One way to get rid of the "film" left on your hair is to use a good clarifying shampoo. "When my clients who have issues with hard water at home come into the salon for a colour service, I usually pretreat the hair with a strong clarifying shampoo such as Nioxin Clarifying Cleanser (£18), which gently removes impurities from the hair prior to applying hair colour," Cleveland said. It's important to supplement your new routine with a deep conditioner like Briogeo Don't Despair, Repair! Deep Conditioning Mask (£30) so the clarifying shampoo doesn't dry out your hair.
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