Aside from that, I believe there's no such thing as a truly clean blade, regardless of how it's stored or carried. Unless you completely sterilize it every time you use it, you're just fooling yourself as to it's cleanliness. If you wear clothing, use a kleenex, sleep on linen bed sheets, or dry your kitchen utensils with a towel, guess what? You're ingesting and inhaling lint, dust, germs and all the other microscopic stuff that we're exposed to 24/7. If anything, a blade that's completely sealed between uses is probably more likely to breed germs than keep them away unless, as I said before, you completely sterilize it each and every time. You're going to pick up stuff from slicing that piece of fruit that will be PERFECT for giving germs a fertile environment in which to grow.