Device designed to detect surroundings and method for cleaning a cover of a device of this type

A method for cleaning a cover of a device configured to detect surroundings of a vehicle, the device including a housing, at least one sensor situated within the housing, the housing including a transmitter/receiver window and the cover, the cover being configured to be transparent to sensor signals of the sensor, and the cover being configured to cover the transmitter/receiver window against external surroundings of the device, and a cleaning unit which is situated at an outside of the housing, the cleaning unit being moved relative to the housing using a drive unit, the cleaning unit being configured to remove contaminants from the cover, wherein the cleaning unit includes at least three first nozzle configured to spray a cleaning liquid onto the cover, and the cleaning unit includes at least two second nozzle configured to blow a gas onto the cover, the method comprising:

• moving the cleaning unit relative to the housing using the drive unit, contaminants being removed from the cover by the cleaning unit,
• the first nozzles being situated between the second nozzles in a plane extending parallel to a movement direction of the cleaning unit,
• wherein the housing includes at least one guide rail, the cleaning unit being situated at the outside of the housing with the aid of the guide rail and being movable along the guide rail using the drive unit.