A wiper of a wiper system for a vehicle is disclosed. The wiper includes at least one wiper blade carried by a support and configured to wipe a glazed surface of a vehicle. The wiper includes a spoiler configured to be connected to a cleaning system distributing cleaning liquid. The spoiler includes a body in which a spray manifold for the cleaning fluid is provided. The spray manifold is configured to be connected to the cleaning system. The spray manifold extends in a main direction of extension of the spoiler and the spray manifold includes at least one row of spray holes. The number of spray holes per row is between 1 and 60 over a portion of the spoiler measuring 10 mm in the main direction of extension of the spoiler.