How should I keep a house squeaky clean, with a filthy little neighbour ghost?

Synopsis

In search for a cheap house, you can turn a blind eye to dirt, stench, and even strange neighbors. But they say that house I am going to move to has a ghost! What nonsense! Ghosts do not exist. And if they appear, my dolly will quickly grind them into a washing powder, and then take the rent.

Main character is the android maid Katty, who has a lot of work to do.