Has anyone ever tried to string 78 usb drives (presumably with active lights) into a christmas tree light to decorate with? Might be interesting...

Although sunlight and some of the other methods here sound more interesting, I would just like to add that I've used lcd screen wipes on my macbook pro shell-casing to no ill-effect. They smell like they have alcohol in them, I would imagine that any form of alcohol would be able to kill at least bacteria.