I have fine hair just above shoulder length, cut into quite a nice slightly layered long bob type thing. When I blow dry it or blow dry it the night before and then straighten it for work it looks nice, shiny and a bit of volume and a bit swingy. BUT within what seems like minutes, ie by the way I am ready to leave or get to work it looks horrid, all thin and fine and not like its been blow dried at all. What am I not doing? Do I need some super product? Or am I destined to wear it up forever?