For the sake of my sanity in shared shower situations i ve chosen to go with explanation 1.
Yellow stains on bathroom walls.
Mineral deposits remain on the wall and build up over time without proper cleaning maintenance.
However the moisture in your bathroom during a hot shower can make the surfactant separate from the paint and seep through showing up on the surface of the paint as darker spots or streaks.
First wipe the yellowing tiles bathroom with a warm towel then evenly apply a layer of toothpaste wait for about half an hour and then wipe them with a rag.
The drip drip of water down the bathroom wall that condensation is caused when hot steam hits cold walls.
It doesn t matter how many coats i use as it always makes its way to the surface.
The paint looks perfect but after a day or two yellow stains start to come through where there was an old partition and on the joins where the wall has been replastered.
In general we can use toothpaste to clean the yellow stains on ceramic tiles.
What are the yellow stains i get around one bathroom commode.
How to remove yellow stains on bathroom counters step 1.
When condensation from a hot shower or bath forms on the walls and begins streaking or dripping down the wall drip marks occur.
These lines result after the water evaporates.
They are also on the walls and floor.
The second explanation is that the yellow stuff is you eww or more specifically the oils from your skin lifted off by with hot water and redeposited onto the walls after the humidity in the room dies down.
Alcohol seems to work.
Of hydrogen peroxide in a small bowl.
It has yellowed the tub fake marble which is never used.
Cigarette smoke can leave a yellowish film on everything over time and in a bathroom during times of high condensation can trickle down the walls along with the condensing water.
Dip a clean cloth or towel into the bowl of hydrogen peroxide.
Wear latex gloves to protect your hands.
Surfactant is an ingredient in latex paint that reduces the paint s surface tension giving it more stability and allowing it to last longer.
It is made worse with clorox.