Dirtiness is called "Kegare" in Japan.
Japanese people are always cleaning because they are very sensitive to Kegare.
Kegare means not only real dusts or germs but also spiritual bad spirits or ghosts.
Removing Kegare is called "Harai or Harae" in Shinto(Nature worship).
Cleaning your house become a strong spiritual barrier/marking of you.
Abandoned dusts make a storage battery for evil spirits.
Bad spirits like dirty place and people who live there.
They easily possess/haunt people.
Your house or room's situation represents your family's fortune, future and inside of brain.
Every space is connected to people who use the space.
Unnecessary things could be your brain's dust = Dementia
Generally, a cleanly woman doesn't cheat on her husband or boyfriend.
A wet area in your house is more important for cleaning.
Clean water area reflects on human's health and economic fortune.
Especially, a situation of bathroom influences on your health and money luck "directly".
Because your excrete dirt and feces from the body are there.
Excretion is sacred, routine molting work to keep your health.
But your invisible partial wastes still have your atmosphere in the bathroom.
Your ectoplasm will grow quickly unless it is cleaned.
Grown ectoplasm is "the second you",
and your body's original energy/power will cut in half.
It means power leakage of human.
The leakage ruins your future. A kind of fetters.
There are more spiritual handicaps maybe you don't know.
Also, evil spirits prefer to wet areas.
They are gathering there because they are thirsty,
or just come because there is dirtiness.
Almost all the houses have extra existences like a ghost.
They can't move because of their fixed mind and gravity.
They always want to drag living happy people down because they feel terrible despair.
Dirty public bathroom may the worst place in the world.
I rarely use public bathroom.
A spiritual ritual for house or apartment room is Yuka-Kuyoh in Japan.
Forced exorcism never save poor ghosts.
Once a ghost is removed by someone, the ghost will find next Yorishiro.
Only mercy help them without side effects.
Do not use your bare hands when you clean the bathroom and toilet bowl.
Please use exclusive slippers and groves.
By the way, in case you have to evacuate in nature field,
please say sorry before you do it.
Because nature spirits/gods hate the attitude.
Cleaning also remove your slight sin that you don't realize.
That is so unique effect.
Zen monk's one of most important training in temple was cleaning.
Not meditation at all.
Not meditation at all.
Anyway, cleaning means a lot.
Japanese people do cleaning in end of the year.
Removing kegare with water is called Misogi.