Fist of all, make sure that you suffer from actual dandruff and not 'dry scalp'. The difference is explained in the Unique Hair Profile module in the scalp lesson. Then, if you really are suffering from dandruff (big yellow greasy flakes) the most important thing is to avoid oils on your scalp, at all times. Avoid shampoos and scalp treatments that will contain any form of oil as it will feed the yeast and bacterias responsible for your dandruff. The few oils that won't feed the dandruff will be MCT oil and squalane (with an A not 'squalene'). Focus on moisturising ingredients, try to do your reset wash a bit more often and never wait several days with your roots oily before washing. That should really improve your condition :-)