If there's one thing modern people all have in common, it's that they all loathe to do housework and yet feel it's necessary, because nobody likes a filthy, disorganized living space. So I'm starting automation plans so that it gets done for you and you can do more important things, like your job, your hobbies, raising any children you have, or maybe finishing that great work of yours.
The bathroom is a room of entirely fixed features. There's a toilet to dispose of waste, a bathtub or shower to clean off one's body, and a sink for hand washing. All of these tend to collect the filth they remove from your body and periodically need to be cleaned, a nasty chore frequently mentioned in rants about how people hate housework.
Since none of these move, and cleaning consists of the exact same motions every time, automation is fairly straight forward. Robotic arms attached to the ceiling can, on a cue or timed signal, lower a scrubbing brush with a cleaning-solution squirter, squirt solution, scrub, and flush away. Human maintenance would only involve installing the system, setting up the cue (Press button to clean, or "Run every day at 3am"), and refilling the cleaning solution tanks. The brushes should also be interchangeable, as they wear out with use. They will need to be replaced when that happens.
The toilet's cleaner consists of a squirting nozzle and a brush. Squirt solution on the side of the bowl, then swirl the brush down the around and down the bowl until it reaches the bottom. Then flush. The toilet is now clean. Raise this arm back into the storage position.
The tub's cleaner first has to slightly wet the tub, in case it's dry, then lay down a bleach powder. It should wait about 5 to 10 minutes, then lower a brush arm, and scrub the powder around. It should then rinse the powder off, whereupon it will take away all the dried soap and dirt with it. Then store the scrubber heads.
Sinks would consist of a similar treatment to the tub, but less extensive and with a shorter waiting time.
Lastly, the tub should have a plughole cleaner, because people often lose hairs while showering without noticing. (At any given time, 90% of your hair is growing and 10% is falling out and being replaced with a new hair.) Removing these hairs often gets quite disgusting, as the hair is wet and dried repeatedly before the user notices. By the time it's cleaned, the hair is a vile smelling, soggy mess. Yuck.
For best results, the shower should be seal-able, as this allows the user to enjoy a hot shower with less hot water, doesn't steam up any nearby mirrors, and prevents mildew from forming.