Hi, I had gone through your query and understand your concerns. You should use your Sebowash Shampoo 0.01% once daily. Shake the bottle well and then apply to the scalp area and massage into the scalp until it lathers. Allow the lathered shampoo to remain on the scalp for approximately 5 minutes and the rinse the hair and scalp thoroughly with water. You should continue to use your Sebowash Shampoo for 2 weeks of treatment and then you can reduce to once a week to prevent itching and flaking of dandruff, as recommended by your doctor. You can also try biotin containing shampoos once the dandruff is eliminated like ducray anaphase shampoo and take oral B complex (especially biotin supplements)