Does Ameridose have any suggestions about this? Or, I suppose, you could save them for your reverse distributor (if you use one) and have them process the bags. You may not get credit for them, but they would be properly disposed of.
They'll work with you on credit/replacement. Check with Stericycle or other third party company how to dispose it. Reverse distribution will take it and dispose it, but you may have to pay for it.