A cleaning system for cylinder surfaces of a printing machine, having a number of automated cleaning devices 1, 1', 1'' allocated to a one or more cylinders, each having a supply line 4, 4', 4'' for the supply of detergent 3, as well as a common feed pipe 5 for the supply lines 4, with at least one supply device being allocated to the feed pipe 5. The supply device includes a piston--cylinder unit 9 and the piston cylinder unit 9 and a detection unit 17, 18, 19 for controlling the piston stroke is provided.