Well I don't know if this is a diy product... But I guess it works like one I have suffered from bad dandruff. Been using head and shoulders for a year or two now and I stopped recently after finding out that it can make dandruff worse. So I decided to create my own natural remedy. I also have dry hair, so I take a good amount of olive oil (enough for my hair and scalp) put it in a plastic bowl and put ONLY 5 drops of tea tree. I put it all over my hair and massage it in my scalp. Then I put a towel on top of my head and sleep on it. The next morning I wash it off with my fav shampoo- and voila! Soft, smooth and minty smelling hair.