In an apparatus for wetting a glass pane, in particular a glass pane of a motor vehicle, a spherical body (15) which supports a nozzle body (20) is inserted into an accommodation space (10) which is formed in a bearing head (9) of an insert body (1). The accommodation space (10) exhibits the spherical body (15) together with resistance projections (12) which fix an annular shoulder and also serve to fluidically stabilize a liquid fluid, which flows into a flow expansion space as a subregion of the accommodation space (10), in the form of, for example, wash water. An oscillating fan-like stream can be reliably generated as a result.