I have a shampoo related problem. I’ve been using ouai shampoo for around 5 months, in the beginning it made a huge difference to my hair but lately it just doesn’t lather and I’m having to shampoo twice. Sometimes after I’ve washed my hair has these patches where it’s like my hair is soaked in oil, even when my hair wasn’t that greasy before.
I washed with head and shoulders and had a lovely lather so maybe the problem is with my ouai shampoo

I completely soak my hair, I massage the scalp, I properly rinse which is everything google tell me I should be doing. Oh I only use a heat protection spray on my hair and wash every other day so I don’t think my hair is overly dirty.