ANSWER 1 Leaving them for a few hours or over-night should not be had for your health. It might severely damage relationships, though. ANSWER 2 Micro and macro organisms dip in and can thrive. More difficult to remove stains from vessels later. This may necessitate use of strong detergents and traces of these soaps may remain on dishes and ingested daily over years. This can cause symptoms of chronic poisoning, which goes undiagnosed and is difficult to treat.
Some do. If you don't rinse them well.
Yes, when you are a guest in someone's home you should not only clean up after your own messes be it dirty dishes or towels to cleaning up the bathroom after you have used it; etc., as your hostess is not a maid.
You can wash your dishes on one side and leave them dry on the other side. If you are lazy and haven't washed your dishes yet, you can still use the other sink.
If you rent a vacation home, then you need to leave it in the same condition it was in when you arrived. Make sure it is clean and all of the dishes are washed. If anything is broken, then you will probably have to replace it.
Wash it once, then cover it up with a plaster or something. You could probably just leave it as long as you don't get your the area around it dirty.
Bathtubs get dirty and greasy. The dirt and oils that leave your body remain in the water and later cling to the sides and bottom of the tub.
Soap bars leave residue in your shower because it is not washed away. This residue has nowhere to go if not washed away.
the best thing for you to do is to leave him alone. if you drop it he will see that the trouble he is trying to make is not working and will sooner or later leave the two of you alone.
Step one is to let them know their ways bother you and to give them an opportunity to not be dirty. If that doesn't work then you can start getting creative. Like if they leave dishes out with nasty food on them, just put them in their room..on their bed. If that doesnt sicken them, then you should probably just move out, because if someone can tolerate that then they probably will never change.
it's the latex
You possibly need a water filter.