1. Gather necessary materials: Before starting, gather safety goggles, gloves, a small wire brush or old toothbrush, baking soda, petroleum jelly, and a clean cloth or paper towels.

2. Put on safety equipment: Always wear safety goggles and gloves to protect your eyes and hands from any corrosive material on the battery terminals.

3. Disconnect the battery terminals: Always start by disconnecting the negative terminal (black) first, followed by the positive terminal (red). This helps prevent short-circuits during cleaning.

4. Create a cleaning solution: Mix one tablespoon of baking soda with one cup of water. Stir well until the baking soda dissolves.

5. Apply the cleaning solution: Use the cloth or paper towel to apply the solution to the battery terminals. Be sure to cover all the corroded areas.

6. Scrub gently: Use a wire brush or old toothbrush to gently scrub away corrosion from the battery terminals.

7. Rinse with water: Rinse off the cleaning solution with water, being careful not to get any on other electronic components under the hood.

8. Dry with a clean cloth or paper towel: Wipe down both battery terminals and any other areas that came in contact with the cleaning solution, ensuring they are completely dry before reconnecting.

9. Inspect for damage: Check both the battery and cables for any visible damage such as cracks or fraying that could lead to future problems.

10. Coat terminals with petroleum jelly: Apply a thin layer of petroleum jelly on each terminal to help prevent future corrosion.

11. Reconnect the battery terminals: Reattach the positive terminal first, followed by negative terminal, ensuring they are secured tightly.

12. Clean up your materials: Dispose of used paper towels or cloths, wash your brushes or tools in warm soapy water, and store any leftover baking soda solution appropriately.

13. Check the charge: Start your car to make sure the battery is functioning properly and charging as it should.

14. Maintain a regular cleaning schedule: Depending on the environment and usage of your vehicle, clean the battery terminals every six months to a year to ensure optimal performance.

15. Take preventative measures: Keep your car battery clean and free from debris by regularly checking under the hood and avoiding parking in areas with excessive dust, dirt, or moisture.