First time i used it it started snowing on my head during spring to the point that so much dandruff came my scalp became red. Honestly, it was even worse for my friends and the dr even told me to avoid it.
Don't wash your hair with shampoo every day. It dries out your scalp and in turn it overproduces oils and makes your hair greasy. Wash your hair with shampoo every other day. It will help with the dandruff tremendously.