I say, just go ahead and use it, you paid for it and unless they can refund your money, why waste them by leaving them unused. I think I might have had a box or two a that were like that, and I think they did work, but not as well. You might leave them for emergencies such as running out, but what if thats all you have and they dont work? I cant imagine them not working? They might actually end up being better? Worse scenario is they might not work for as long. Just my thoughts.