Abstract: High-pressure washing liquid spray intended for use in a washing machine for ophthalmic glass or other substrates, consisting of an entry opening (11) for washing liquid and an exit opening (12) for liquid in a jet, connected by a channel. The channel (1) has a rectangular channel in cross section which introduces a constriction, in particular in the center, giving that channel an X shape, so as to form, on one hand, downstream of the above-mentioned constriction, an expanded exit cavity (13) ending in a slit forming the exit opening (12) and, upstream of the above-mentioned constriction on the other hand, an entry cavity (14) in the base cone where the rectangular base forms the entry opening (11) of the channel (1).