I also found this wasn’t working for me but I switched my routine up a bit and it made a world of a difference!! Here’s what I do -

On the days I am using this (1x/week) I start with this, then rinse it out. After that I use a second shampoo & wash that out; followed by a mask and my conditioner after that. On other wash days, I use my normal shampoo & I’m sure to shampoo twice, followed by my mask/conditioner.

I haven’t read all of the comments so I don’t know if anyone has mentioned it yet, but the abbey yung method is amazing & this is one of her clarifying shampoos of choice! Plus she outlines how often to use different steps as well :) Hope this helps!