You can put them in the dryer on frenshen load or something similar to that - depending on your dryer -- I would put a fabric sheet with it tho.
A friend and I received a quilt top that was made by a heavy smoker and we had to get the odor out - no way we could give it to fire victims that way & we just freshed it in the dryer and it worked! Better than having to wash it all right now and certainly worth the try.