quilterella

I recently traded some fabric with a friend, and man-o-man talk about cigarette smoke. I mean I knew she smoked ( I am an on again-off agin smoker) but talk about a good way to ruin fabric. I placed the fabric in a box and layered it with Bounce dryer sheets(unscented version- no perfumes/no dyes) and that seems to have done the job of getting rid of the smell. My question is: How do you remove the yellowish/brown streak that cigarette smokes leaves on the fold of the fabric? I knew there was a reason why I and everyone smokes outside at my house!