How to clean the carbon deposit in spark plug?

The following is a detailed solution to clean the carbon deposit in spark plugs: 1. First, take some carburetor cleaner, then pour it into a small cup and completely soak the removed spark plug in it. 2. Soon, you can see many small bubbles on the surface of the spark plug. About 1 hour, most of the carbon deposits will be removed. This is the copper brush that cleans the residual carbon on the surface. 3. After the dirt and carbon deposits are cleaned, clean them with gasoline or coke. You will see the new look of the spark plug. The spark race has been cleaned up.