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One of the best automated cleaning devices is an air purifier. It can run all day long, and it takes dust and other particles out of the air. I have a large air purifier that I call "Galatea's little sister", because it has the same color scheme (black and white with blue lights), and it cleans for me.
Galatea has a mini air purifier on her base, and it's a good way to add cleaning abilities to your robowaifu.