my question was why does cowashing make my scalp less flakey and less build up then sulfate shampoo or a non sulfate shampoo. I have to use a sulfate once a week cos i get build up bad. it just shocks me that a conditioner is cleaning my scalp better then a shampoo. my products are

cowash is vo5 the black berry tea one
my hair is short so I don't really use a rinse out anymore but when I do I use garnier pure clean.
my leave in is kinky curly knot today
I seal with olive oil on my ends.
my styler is herbal essence mouse. its non drying so i have to use it. but that might be causing the build up