I agree with Jano, to an extent; whatever you're brewing with, Chemex or V60, etc, will need to be cleaned too. Granted with paper, you can follow the rinse daily/wash weekly routine. But you can do roughly the same with a Kone. The main difference is in getting the spent grounds from the Kone and into the garbage. There's always some grounds remaining, even after tapping it into the garbage, which will end up in your drain.