It is not very environmentally friendly of me, but I have a “germ thing” and use papertowels to open door handles. I don’t want to touch the dirty handle with my clean hands. The Handler is a little dorky, but no more so than going out of my way to avoid touching door handles. I won’t even pretend to understand the science, but somehow the handler is infused with nano silver – it essentially prevents bacteria from growing…it fits right on your keychain so you will always have it.