A filter arrangement for a humidifying device. The filter arrangement has: a rotatable body; a humidifying filter member arranged to be wetted with water; a guiding arrangement configured to guide water to a discharge region; and at least one discharge bucket arranged on the rotatable body. The at least one discharge bucket is configured to lift water from a tray and to discharge the water to the guiding arrangement as the rotatable body rotates in a first direction about a rotational axis. A humidifying device comprising a filter arrangement and a method for cleaning a humidifying filter member of a humidifying device are also provided.