Bunch of tangles on your head

I've been using the shampoo for a very long time now, but I didn't like it right away. I wanted to throw the shampoo away, but I thought that was a shame, so I kept using it to give it another chance. Every time I wash my hair, it gets incredibly stiff and I can't get through it. There is a gigantic bunch of tangles on my head that can't be removed after showering with the brush. Unfortunately, a no for me...

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