Disorder or disorderliness in the home or office is a clear sign of mental disorder or mental illness.

Not doing the dishes is a common way to spread germs around your house. "Ultimately if you leave dirty dishes around and there are people in the house, and possibly animals, they are likely to spread bacteria around," Associate Professor Mullan said.May 18, 2016
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Do the dishes: Why you should

If hand-washing dishes though, Professor Mullan offered the following tips:

"Have the water as hot as you can bear (wear rubber gloves)."
"Use detergent and some sort of scrub or brush so you are actually removing the food particles with brute force."
"Use a clean dishcloth, because the dishcloth is the dirtiest thing in your kitchen normally."
The best way to keep dishcloths clean, other than replacing them regularly, is to microwave them.