I have a wonderful experience to share with you. I mixed Lugols 5% Iodine into water. 90% water & 10% iodine. Apply to the scalp with a squeeze bottle & towel dry. Apply daily for 2 or 3 days and the Dandruff literally disappers for about 12 weeks. Iodine also kills fungus. If your case is severe, apply the Iodine mix several times per week. I also use iodine cream to kill foot fungus. Lugols Iodine can be squirted into any face cream & mixed in to make iodine cream.
If you have such severe problems then I suspect you are severely deficient in iodine. I suggest doing the Dr. Brownstein Iodine Protocol: http://tinyurl.com/Iodine-Handout