Cleaning apparatus for sensor

A sensor-cleaning apparatus comprising:

• an upper piece;
• a lower piece fixed to the upper piece, wherein the upper piece and the lower piece form a tubular segment that is elongated along an arc of a circle and encloses a chamber;
• a plurality of inserts inserted into the upper piece;
• and
• a plurality of nozzles;
• wherein each nozzle is formed of the upper piece and one of the plurality of the inserts;
• each nozzle includes a deflection surface and a tunnel from the chamber to the deflection surface;
• each tunnel is partially formed of the upper piece and partially formed of the respective insert;
• the upper piece includes a plurality of slots;
• each insert is inserted into one of the slots;
• the lower piece includes a plurality of pegs extending into the chamber;
• each peg supports one of the plurality of the inserts;
• and
• each peg is positioned outside of the plurality of the slots.