I got some donation fabric recently and tried several things (sprayed fabreeze, dryer, washed it)before I found one that worked. What finally worked was I draped the fabric outside and the fresh air cleansed it. It was so smelly that I couldn't stand to be around it. You might try that. It's free and relatively low fuss to do it. Try it with a sample and see if that works. I'm sure my neighbors thought I was a bit crazy with all this fabric draped over things!