A cleaning apparatus includes at least a holder, a lance with a fluid distributing device, a drive unit for a translatory movement of the lance in the holder, a first fluid conducting system with a first feed, a first return and at least one first flow path proceeding from the first feed toward the first return for cooling the cleaning apparatus, and a second fluid conducting system with a second feed and at least one second flow path proceeding from the second feed toward the fluid distributing device.