Quote Originally Posted by arcaxis View Post
I'm thinking Dave may have meant Sodium Bicarbonate (baking soda) which could be used on an 'acid' type battery such as in a car. If the AA battery is an 'alkaline' type it takes a bit different approach and actually uses a mild acid to neutralize it. Just go easy to avoid liquid seeping into the electronics of the mic.

How to Clean Alkaline Battery Corrosion | LoveToKnow
How to clean a battery compartment containing corroded alkaline batteries..
Yeah, thanks Mark, I got that ALL wrong! (except the silicone oil)