The Selecta cleaning gun is the ideal tool for the cleaning of laboratory glasses, pipettes, syringes, catheters, cuvettes, endoscopes, cystoscopes, cannulas and other objects in the hospital, laboratory or medical practice, i.e. everywhere where the highest hygienic standards and cleanliness matter. The cleaning is performed especially fast, efficiently and thus cost effectively by water or pressured air. With the new Selecta cleaning gun, the water or air jet can be precisely and finely controlled by way of an innovative dosage mechanism, infinitely adjustable by moving the trigger. The maximum water or air flow can also be set by dint of a small knurled screw behind the trigger.