I bet you all think I have scraggly hair but, I only wash it about once or twice a week, and I get compliments all the time on how wonderful it is. Honest.
As long as I brush it (not just comb, and not the fake plastic brush either) the oil from the roots spreads to the whole length and I can skip the wash alot. (I do shower every day though,

.)
I think the fact that I do not use ANY 'stuff' on it helps. No gel, no dye, no sprays, nothin just hair and a brush. The oil from my head is perfect for keeping most flyaways in check, and is still not bad enough to need washed. But I couldn't go from every other day to once or twice a week overnight, it was a gradual thing, brought about by a DD who was not happy without mommy for a month or two. TIme stolen to get clean was not always wasted on hair!
Anyway, my DD doesn't either, but my DS and DH do cause they use gel to keep the hair curly not frizzy, bout a pound of it too. I wish I had a way to make gel cheap.