How do 4S shops clean the engine compartment?

[VonRiver]

4S shops generally use compressed air to blow away the dust inside the engine compartment, which is very common. Basically, they will clean it for you during maintenance at the 4S shop. We can also clean the engine compartment ourselves. However, the engine compartment has a complex structure with some sharp edges, so it is necessary to wear gloves to avoid scratching your hands. Below are the steps for cleaning the engine compartment. Evenly spray the engine foam cleaner on the surface of the engine compartment, applying more to areas with excessive dirt. After waiting for a moment, use a cloth to wipe the foam off the surface of the compartment. If some dirt remains, you can appropriately increase the amount of cleaner on the areas that need it and repeat the process a few times. After wiping it clean, fill a spray bottle with water. If possible, use a specialized cleaning solution to spray the compartment, then wipe it clean with a cloth again.