There is no official recommendation on how often the cleaning water should be changed, as this robot vacuum does not have an internal water tank for the cleaning water and the water is filtered and drained directly into the base station.

The dirty water in the base station’s tank should be emptied after each use and the tank cleaned to prevent unpleasant odours. The fresh water tank in the base station should be cleaned every two weeks. As the robot does not store its own supply of cleaning water, but instead moistens the pads in the station with fresh water and then cleans them, there is no need to ‘change’ the cleaning water in the traditional sense – instead, the entire system is automatically cleaned in the station and the dirty water is pumped out.