I was using this with a Roomba Combo j7+. Due to a mechanical failure in the mopping function of the Roomba itself, I replaced the entire unit, so the Clean Base is no longer needed and I am selling it. It was working without any problems until December 2025. There are minor scratches from normal use, and I have cleaned it as much as I could reach, but since it was done by an amateur, there may be some oversights. Please refrain from purchasing if you are looking for something in new condition.