Is it build-up?
I've been using sulfate-free cleansers for the past year now and in the last month my hair has been getting greasy/sticky at the roots as soon as I wash it. I thought I was just not washing my shampoo out properly but even if I spend half an hour trying to clean it, I still get the same result. Curl is a little more defined at the ends but everything just looks limp and lifeless. Even more recently I've started to notice dandruff at the roots. I've tried a clarifying shampoo but the results only lasted a day or so longer than before. Is it maybe product build-up or am I just doing a terrible job at washing it? Hair is 2c, medium density and low porosity