Several days of exposure to fresh air, as well as forced breathing --compression followed by fluffing once in a while may do wonders over several days. There was at most a short exposure, not the smoke reek of a campfire I was gifted with as an unexpected extra on a "used one weekend" Clark NX-250.
Several hours of Santa Barbara sunshine will also help. Yeah, there's UV, but the quilt will last 37 years instead of 37 years 1 month as a result.
Fresh air: Good for you. Good for your gear.