I'm having the same problem. I tried the Rosemary tea that seems to be in all the threads concerning dandruff. It seems to be helping. I had it pretty bad last week and sprayed some in my hair and let it sit over night then sprayed more, let it set for thirty minutes and rinsed. I've still got a little dandruff, but nearly not as bad. I couldn't find any specific recipes with measurements. I just filled a spray bottle up with water, poured it in a pot, added a pinch of sea salt, dumped about half the thing of Rosemary in there to get a good strong, dark tea and squeezed some lemon in there for aroma and maybe to help lighten my hair and let it boil for about 5 minutes and strained back into the spray bottle. Soaring Eagle seems to suggest Rosemary Oil for a deep cleanse, but I wasn't able to find any at the market.