I have been seeing a white substance on my hair roots lately. I just don't know what it could be. I can easily remove it with my fingers, it slides off. It's been like this for 2 months. I have a full head of hair and am currently suffering from mild dandruff/seborrheic dermatitis. Could it be related to that? Already tried Selsun shampoo for 4 weeks, but did not help with these balls. See photo below, it's not my photo but it's exactly like this.