What on earth should I do about my bangs getting greasy?

I never worried about this even back in high school when I was full of energy and my hair was dripping with oil. I don't know why my bangs have become so greasy and matted this year. Is it because of the weather? How do you all deal with oily bangs in the afternoon? I wash my bangs along with my face in the morning, but they get really greasy by the afternoon. Please give me some tips on how to solve this.