I don’t know if it really works, but a toothbrush sanitizer would at least make me think my toothbrush is clean. Put the toothbrush in the case, turn the thing on, and your toothbrush is clean. Or so they claim. The UV light would kill any nasty buggers on the brush.
That’s fine and all, but why couldn’t I turn on a UV light next to my toothbrush and accomplish the same thing?