Removing grody gunk from plug-in items similar to SonicCare or Waterpik? Anything you use on your mouth then replace to a underpinning that...

Anything you use on your mouth then replace to a underpinning that is plugged into an outlet seem to get this wan gunky deposit build up before you realize it. Anyway, you can stick contained by under the faucet it's electrical (even unplugged is not good) so, is in attendance a best cleaner to use with an feeble toothbrush or something to clean the gunk past its sell-by date?? Thanks.
Answers:    one of moms favorites baking soda and warm dampen
i have have the sonicare for ten years and have never have a build up and have have the waterpik for five and have never have it build up on it ether. don't you wipe the things off once and a while? anyway if the build up is mineral in recent times use LCR on it and it should just wipe past its sell-by date.