I made dry shampoo a bit back and it was almost perfect, but not quite. I used corn meal in the blend, which was too lumpy. It was kind of chunky and grainy and my eldest daughter complained of bits. It was also too light for her brown hair. I looked around and found this great tip for adding cocoa powder to make the whole batch darker—which is much nicer for most hair colors, I think. I also ditched the corn meal. We added grapefruit essential oil and have been using this a new batch a whole lot.
I know some people wonder about dry shampoo. Why not just wash your hair? Well, you know how it is, especially with long hair, it's just not reasonable sometimes, or even needed all that often. Also, my hair, as I have gotten older, has gotten a lot finer and the powder adds some body and fullness that I really like, especially on my roots.