You want to stay on the cleaning of the battery acid. My wife's Ford Explorer had this. Even though she does all her oil changes at Quick Lane, Ford never caught it as it is under the plastic cover on the post. It corroded half of cable connector. Even though you can take the connector apart, Ford only sells the whole assembly. A year later, again after an oil change, it corroded up again and the connector was shot. Fortunately she had a Ford Extended Warranty and they cleaned the battery and replaced whole cable assembly. I then bought a new battery and used dielectric grease and no problems. I have been told sometimes a small crack at the post will causes acid to gas out and cause this. Either way, since new battery, no problems. Some people also suggest to get this fabric rings that go over battery post and then terminal goes on. This worked at stopping corrosion on our Ford tractor.