Where' s the data that says they don' t work? I' ve used them enough to prove to myself they do help, WHEN USED PROPERLY. If you think that they' re a cure all and there' s no longer a need to do everything possible to be scent free, then your right, save your money. If, on the other hand, you realize that they' re just another part of the scent free process, then they' re well worth the money. Unfortunately, it seems most people who buy them use them improperly and don' t get the results they expect. I' ll admit, some of this is due to the claims made by the manufacturers. WiGutPiles, glad they gave you a replacement. It would probably be worth a call to Robinson Outdoors and find out if there' s a mistake somewhere.