i only wash my hair 2-3 days per week. it's very wiry and curly, and my new style requires straightening, which takes FOR-E-VER, so i wash only when necessary. first i have to blow it out with a round brush, then straighten it, and it's thick, so i have to do it in two layers. luckily, as others have said, my hair is less oily now that i've gotten older, so it usually looks even better on day 2 or 3 than it did on day 1!