From the same company that makes toothbrush sanitisers comes the gadget sanitiser - seen here rinsing an iPhone with UV light to kill all the nasty germs living on it.
Sounds like one of those devices that no one really needs, right? I mean, you could just use a sanitising hand wipe or something - or even put up with the germs. They're not going to kill you, after all. There's a good chance it might ward off a cold or two though, so for that I'd give it a chance.