How to clean carbon formed in battery? All Questions › Category: Battery Management System › How to clean carbon formed in battery? 0 Vote Up Vote Down Chetan Shidling asked 5 years ago I need short information. 1 Answers 0 Vote Up Vote Down Chetan Shidling answered 5 years ago By applying petroleum gelly you can clean carbon or corrosion which is formed on battery. You can also use vacilin if you don’t have petroleum gelly.