There's never been smoke in here--from cigarettes--ever. We do have a wood furnace, but this piece was in the back of a closet--behind other fabrics. Another blue piece I pulled from a back pile had some too--but in streaks--not on the fold lines. These are old pieces, but I thought that didn't make a difference.
The reason I wouldn't use it is because I wouldn't want the "good" parts now to become yellow in the future--while it's in a quilt! That would be terrible, esp. if I sold it! And if I gave it away, I'd want the person to see what was wrong. I'd not add it to the landfill--I'd use it for something else--I meant toss it from quilting purposes. :wink:
They're in the washer now.