This will sound strange but it often moves to another room altogether so several meters off the base and around a complicated route. I've never caught it in the act. It often moves towards the front door. The charging base is typically switched off as I only charge it when I want to do a long clean. The funny thing is that it does not do this at all during the day. I don't think my neighbour has one with the same remote control as I hear her loud, traditional vacuum cleaner and she is not very tidy anyway. Does anyone else have any experience of this?