there are a couple of things you can try. One is a product called Nature's Miracle and you can find it in pet stores. It's sold to remove pet odors, but you can use it for all kinds of smells. Stinky drain? pour a bit down there. There's a formulation specifically for laundry. Another, even though it sounds weird, would require putting the dry clothing in a zip lock bag and freezing it. You may have to leave it in the freezer for a couple of weeks. I've gotten rid of some odors on things that way, although it doesn't always work.