Cleaning device (100) for cleaning the inside of containers, comprising a supply hose (103) for the passage of a cleaning agent, a nozzle unit (101) hydraulically connected to the supply hose (103), which comprises at least one spray arm (104) running from the center of the container in the direction of the container wall , wherein the nozzle unit (101) is suspended in a container and the height of the nozzle unit (101) can be adjusted by changing the length of the section of the supply hose (103) in the container, at least one stabilizing arm (109) being present, which runs in a common plane with the spray arm and which is mechanically connected to the spray arm (104) via at least one strut (110).
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