Cleaning system for cleaning mould segments of a mould press , the cleaning system comprising a frame , a dry-ice container and a nozzle , which is connected to the dry-ice container via a flexible hose , for forming a dry-ice jet (T), wherein the nozzle is operatively connected to an adjusting unit , wherein the nozzle can be moved relative to the frame by electrically actuating the adjusting unit , wherein the nozzle is arranged on a tool of a robot unit having a plurality of robot arms , wherein the robot arms are connected to each other in an articulated manner and can be pivoted in relation to each other in such a way that the nozzle can be moved freely in space when the robot unit is actuated, wherein a rear robot arm is connected to a robot foot of the robot unit rotatably about a rotation axis , wherein the robot unit is fastened to a holder of the adjusting unit via the robot foot , wherein the holder is oriented in such a way that the rotation axis of the rear robot arm is oriented substantially horizontally in an x-direction in order to allow the adjusting unit to move the robot unit to a start position (PS) between the mould segments of the mould press , characterized by a camera for capturing a reference region (RB) situated on the mould segments and/or on the mould press , and a control unit which is designed to actuate the adjusting unit for setting the start position (PS) of the robot unit in such a way that a structure (K) fixed to the camera is oriented in a defined position relative to a reference object (RO) arranged on the mould segments and/or on the mould press in the reference region (RB), and a distance sensor for measuring a distance (D) between the tool and the mould segments and/or the mould press , wherein the control unit is designed to electrically actuate the adjusting unit for setting the start position (PS) of the robot unit in such a way that the distance (D) approximates a reference distance (RD). wherein the nozzle is arranged on a tool of a robot unit having a plurality of robot arms , wherein the robot arms are connected to each other in an articulated manner and can be pivoted in relation to each other in such a way that the nozzle can be moved freely in space when the robot unit is actuated, wherein a rear robot arm is connected to a robot foot of the robot unit rotatably about a rotation axis , wherein the robot unit is fastened to a holder of the adjusting unit via the robot foot , wherein the holder is oriented in such a way that the rotation axis of the rear robot arm is oriented substantially horizontally in an x-direction in order to allow the adjusting unit to move the robot unit to a start position (PS) between the mould segments of the mould press , characterized by a camera for capturing a reference region (RB) situated on the mould segments and/or on the mould press , and a control unit which is designed to actuate the adjusting unit for setting the start position (PS) of the robot unit in such a way that a structure (K) fixed to the camera is oriented in a defined position relative to a reference object (RO) arranged on the mould segments and/or on the mould press in the reference region (RB), and a distance sensor for measuring a distance (D) between the tool and the mould segments and/or the mould press , wherein the control unit is designed to electrically actuate the adjusting unit for setting the start position (PS) of the robot unit in such a way that the distance (D) approximates a reference distance (RD). <EOS>