SENSOR CLEANING SYSTEM, SENSOR CLEANING METHOD, AND VEHICLE

A sensor cleaning system cleans a sensor surface of an external sensor mounted on a vehicle. Specifically, the sensor cleaning system estimates a water droplet amount of a water droplet adhering to the sensor surface of the external sensor. The sensor cleaning system determines whether a cleaning start condition is satisfied based on the water droplet amount. The sensor cleaning system executes a cleaning process of cleaning the sensor surface when the cleaning start condition based on the water droplet amount is satisfied.