Then don't market your product as something that can go for a month without a wash (that's pretty nasty when it comes to bedding, imho). Market it as luxury bedding that won't allow for bacteria to grow and will keep people healthier as a result.
Also, what about marketing this to hospitals, retirement/nursing homes, NASA, movie theaters (for their seats), etc? I think there are many vertical markets that would need anti-bacterial fabrics.