I have the same problem, the only way around it that i've found so far is just to wash it everyday. I don't like using talcum power or dry shampoo because it still feels kinda greasy which isn't a very pleasant feeling. A lot of the time it's the feeling more than the look that makes me feel the need to wash it, it doesn't look too bad after a couple of days, but I hate how it feels.
I don't think I can put it down to the shampoo/conditioner I use because I use all different kinds. I do touch my hair a hell of a lot though, especially when it's all blowing around in the wind, I don't really have a choice! So I can probably put it down to that.
I could just cut it all off I guess....haha