Engine bay cleaning involves removing dirt, grease, and debris from the engine compartment of a vehicle. This process helps maintain the engine's performance and can prevent potential issues caused by accumulated grime. It typically includes using degreasers, brushes, and water to clean various components without damaging sensitive parts. Regular engine bay cleaning can also enhance the appearance of the vehicle and make it easier to spot leaks or other problems. It's advisable to cover electrical components and sensitive areas to avoid water damage. Many car enthusiasts and professionals recommend this practice as part of routine vehicle maintenance.