On Fri, 14 Aug 2015 04:31:50 +0000, MNMikeW wrote:


That was an interesting article, which also said that it could be a
mixture of ammonium chloride and manganese dioxide in the comments.

It seems that lemon juice or vinnegar (ie weak acids) are the way to
clean it up chemically, based on that article.

I've used a Qtip dipped in tap water to remove the most of these
deposits. Vinegar should be used cautiously as acids may attack the
metals used in the battery contacts in the device you're trying to clean
up.

Thane