I would probably hand wash it, but if you are too nervous to do that, then I would sprinkle it with Baking Soda & after it had a while to absorb the odors, put the brush attachment onto my vacuum & vacuum it up. Haven't done it on an unfinished quilt before, but it works great between washes on finished quilts so I would think it would help.
Also, if you live in an area with nice weather, you can lay it out on the lawn or hang it from an outdoor clothesline & the sun should help freshen it up a bit (assuming you aren't bothered by the smell of grass).
Last edited by Bree123; 09-06-2015 at 02:31 PM.