A cleaning system comprising a tank having a wash area arranged to receive an article for cleaning; an inlet assembly mounted to a first end of the tank, through which a cleaning medium flows into the wash area; an outlet assembly having a flow control plate mounted to a second end of the tank; the flow control plate having a plurality of apertures and arranged such that the cleaning medium flows from the wash area through the apertures; the flow control plate arranged such that a total outlet area of the tank is equal to a sum of areas of the apertures; wherein the proportion of the total outlet area about the flow control plate is inversely proportional to a depth of the tank.