How to clean up the car carbon deposit?

There are several ways to clean up car carbon deposits: 1. Engine disassembly and washing: In terms of effect, engine disassembly and washing is undoubtedly the most effective way to clean up carbon deposits, but the whole process takes a lot of time and energy. It is necessary to disassemble the engine, and then thoroughly remove the carbon deposits on the parts with cleaning agents and ultrasonic waves. Of course, the price is the most expensive. 2. Car bottle hanging: hang a bottle-shaped tool above the engine, then pour the cleaning agent into the bottle-shaped tool and introduce it into the engine through the conduit to clean the carbon deposit. However, if the engine carbon deposit is serious, this method will lead to the blockage or damage of the three-way catalytic system. 3. Machine washing: inject the cleaning agent into a machine, then press and contact the combustion chamber with the machine, let the cleaning agent react with the carbon deposit to dissolve, and then pump out the waste liquid. This method has a good effect on some cases with serious carbon deposition, and it is not necessary to disassemble the engine, but the cost is high and the oil needs to be changed after cleaning. ?