Johnny Cat litter is supposed to work if you can store the fabric in a sealed box with it. Deactivated charcoal, baking soda, newspaper, etc. They are all supposed to work, but I've bought fabric at an estate sale that I regretted because it just would not get the odor out. The same with a whole box of crochet cotton I bought. Now, I'm going to sell it at my own yard sale!
I soak cloth in vinegar and baking soda mix with a drop of dish soap, then rinse and air dry.
I used my new washer to soak new charm packs and a layer cake, vinegar in the soak, then seperated each piece before I put it in the dryer. Hours of work, and ended up having to press 165 pieces of fabric. I will not buy charm packs again.