So you can wash your hair at night and it will not get dirty by noon? How long can you go without washing your hair?? I like having clean hair, but generally only wash it once a day. I would love if I could just wash it at night and have it be clean the whole next day. That way I could style my hair a bit before going to work. I just don;t allow myself enough time in the mornings to wash it, blow dry it and style it. And I would hate to blow dry everyday anyways.