Cleaning apparatus for sensor

A sensor apparatus comprising:

• a cylindrical sensor window defining an axis;
• and
• a tubular annular member fixed relative to the sensor window and substantially centered around the axis, the annular member including a plurality of first nozzles and second nozzles arranged in an alternating pattern around the annular member;
• wherein the first nozzles and the second nozzles discharge from a same plane, the plane being perpendicular to the axis;
• the first nozzles each have a direction of discharge in a radially inward and axial direction forming a first angle with the axis;
• and
• the second nozzles each have a direction of discharge in a radially inward and axial direction forming a second angle with the axis, the second angle being different than the first angle.