Originally Posted by QuiltE
How bad is the smell? a little musty-ness? or worse?
I wouldn't wash the pieced work, for fear of the damage that may result. Start by putting them out in the fresh air and see if that can help. Best if you can lay them singly.
I have had them laying out all day in the sunlight, strong musty-ness smell. It has helped a bit but not to much.