Not car batteries, but AA or C alkaline batteries that let loose in your device (trailcam, radio, flashlight, etc).
I've used baking soda paste with minimal success. Emery cloth and/or wire brush - depending on access - seem to provide decent success, but doesn't get rid of all that leaked acid which always creeps back in.
How do you clean up the mess & refurb the SS contacts and springs so it's usable again?
If you email a pic to Duracell etc. They will typically send you replacement cost of the Maglite,.. radio... trailcam etc.
I have been doing this for years...
