An improved device and a method for processing cleaning fluids, with the device including at least one flushable coarse filter for coarsely filtering the cleaning fluid, a cross-flow filter for finely filtering the coarse filtrate from the at least one coarse filter, a return line through which the coarse filtrate is fed through the cross-flow filter in a circuit, a flushing device for flushing the coarse filter, and a drain branching off from the circuit and connected to the flushing device for flushing the coarse filter with the coarse filtrate fed through the cross-flow filter in the circuit.