How do you clean your car battery which has corrosion?

To clean a corroded car battery, first ensure the vehicle is turned off and disconnect the negative terminal followed by the positive terminal. Use a mixture of baking soda and water to neutralize the corrosion; apply it with a brush to the terminals and cable ends. Rinse with water and dry thoroughly, then reconnect the terminals, starting with the positive terminal first. Finally, consider applying a battery terminal protector or grease to prevent future corrosion.