Found it works best when leaving it on for as long as you ...

I would say this “works great” but I don’t see a dramatic difference but it has helped. Definitely will stain your hands. Found it works best when leaving it on for as long as you have time for in the shower and scrubbing it frequently. The downside is I do feel a build up on my hair when using it. If I bought another blue/purple shampoo I would probably go with something different but it’s doing it’s job for now.

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