If that does not solve the problem - or if you already have your hair washed daily - then you should switch to an anti-dandruff shampoo. They contain ingredients such as zinc pyrithione, salicylic acid or selenium sulfide, and ketoconazole as active ingredients in order to kill the fungus and to control the problem. Use the "let foams - rinse - repeat method" and make sure you every 3 to 5 minutes, let the good foaming shampoo on the scalp. Maybe you should be alternating between brands with different active ingredients to make sure that the mold is not resistant is thus less effective the product and treatment. Once a month exchange brand, is a good way to combat this problem.
Once the symptoms of dandruff are gone, you should be able to keep by continuing to use the product. Weekly in good condition the hair
There are people who prefer homeopathy to fight dandruff. If you want a more "natural" solution, then maybe try a solution of 2 parts vinegar with 6 parts water and rinse your scalp. You can apply this mixture on the scalp and massage before bedtime (as you turn your head in a towel while sleeping) and the solution reapplication morning when you get up. Then rinse your head with water.