Oh, yeah I guess you&#x27;re right, it&#x27;s water soluble. I was thinking more &quot;hygroscopic&quot; when you talked about it ruining electronics, but I guess you just meant that if it got wet it would cause the device to have bitterant all over it forever.<p>I don&#x27;t think it necessarily needs to be that messy. It has no smell, and you can buy nail polish that contains the stuff (used to deter nail biting and thumb sucking), so apparently it can be painted on in a fairly durable fashion. Just a dot on the battery case ought to do it.