A cleaning apparatus includes at least one cleaning nozzle that generates and directs a high-pressure liquid jet towards a point of impact on a surface, such as a conveyor belt having a drying screen. A downflow, knockback condenser is disclosed that utilizes a vapor riser to introduce a flow of vapor into a headspace above a vertical tubular heat exchanger, thereby establishing a downflow of condensed liquid and a lighter gaseous fraction through the heat exchange tubes. In the preferred embodiment of the present invention, a vacuum cleaner suction nozzle is provided with symmetric left and right agitator disposed adjacent one another. An imaging media package retaining mechanism is associated with the magazine of the imaging system.