A cleaning device for cleaning a see-through area of an environment sensor of a motor vehicle and for determining an operating-pressure-dependent functional state of at least one cleaning nozzle, the cleaning device having the at least one cleaning nozzle, which is configured to dispense a cleaning fluid. The at least one cleaning nozzle may have a pressure sensor configured to assume at least one position as a function of an operating pressure of the cleaning fluid at the cleaning nozzle and thus determine an operating-pressure-dependent functional state of the at least one cleaning nozzle, in particular as at least one measuring signal.