I have always just poured part of a bottle/can of soda (Coke, Pepsi, etc.) on it and it clears it up right away.
In case you did not realize, I was being serious. The acid in the soda will neutralize the corrosion very quickly.Like I said not much with car stuff but this is a new problem that started a few months ago. It is my wifes car so don't want her stranded,
$100 is the cheapest I've seen a battery in probably 10 years. Maybe it's an East Coast thing, or the type of car you have?
Have used them and they work pretty wellget yourself some of these. They are really cheap and will slow the corrosion buildup.
https://www.amazon.com/UTSAUTO-Batt...t=&hvlocphy=9008492&hvtargid=pla-661831252230
The "special" stuff is silicon based rather than petroleum based. It's easier on rubber and plastics and might last longer in some situations.The stuff I bought looked a lot like Vaseline and was about the same consistency It may have stuff in it that specifically prevents corrosion I dont really know though