A window-washer sprayer is configured to provide an orientable jet by substitution of a cylindrical nipple installed within a seat of an enbloc sprayer body. The sprayer body defines the seat, an internal duct for passage of a detergent fluid, and a side window made in a position corresponding to the seat and partially occupied in use by the cylindrical nipple. The internal duct, the seat, and the nipple have a geometry such that when a flow of detergent fluid is fed into the internal duct it splits by fluid-dynamic effect into a number of separate flows that simultaneously reach the seat and are expelled through a through radial slit or a plurality of through radial holes selectively made in the cylindrical nipple in a position corresponding to the side window of the sprayer body.