Cleaning Battery Contacts

Another product is grease that contains either silver, or copper. electricians also used a conductive grease for aluminum to copper connections, because aluminum expands and contracts at a different rate then copper, causing bad joints in wiring of power connections. and the electrolysis between to different metals.

Here's a web page that explains applications of a particular brand, I am not endorsing the product, just educational info.

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I use silicon paste.  It is a bit messy, but your connections will stay clean.  I started using it for things on my car....lubricating brake parts like caliper pins.  Works great!

White lithium grease is my choice for preventing battery terminal corrosion. Small tube runs about $3.00 here.

Yes I have used that and afterward use baking soda. Then use Vaseline, it doesn't seem to interfere with electrical conductivity. Also on corroded connections I tin them to keep corrosion at bay when possible.

I have found that with corroded connectors for batteries from alkaline batteries use white vinegar to clean them.
It works great.