What Causes Yellow Stains on Toilet Seat: Expert’s view on How to Remove them?

We all sometimes have encountered yellow stains on toilet seat, don’t we? It gives a wrong message to your guest. To save your reputation, you should have an immaculate and unstained toilet. But have you ever thought about what causes yellow stains on toilet seat?

Well, to sate your curiosity, we have come up with this stainless write-up. We are gonna unravel the underlying causes of yellow stains as well as the solutions. 


What are The Causes of Yellow Stains on The Toilet Seat?

What Causes Yellow Stains on Toilet Seat
What Causes Yellow Stains on Toilet Seat

Yellow colors don’t necessarily mean that the toilet seat is dirty. However, none wants to use a stained toilet & we should know when to give up on cleaning & get a new one. 

To prevent these stains from appearing, we first need to know their causes. Let’s see then. 

Urine stains

The yellow stains on your toilet seats are most likely from urine. When urine comes in contact with water, ammonia salts break down into ammonium hydroxide, breaking down organic matter like bacteria, and fungi on the toilet seat. 

After some time, the toilet seat may develop yellow stains from high uric acid concentrations. Flush the toilet every time. Everyone should clean up the toilet seat and lid properly after every use.

Hard water

Hard water also causes yellow stains on toilet seats, and the reason behind this can be a build-up of calcium and other minerals that can accumulate over time on the toilet seat. To get rid of this, you can use fresh water.

Sun exposure

Open sunlight causing yellow stains is rare. Sunlight containing UV rays is responsible for sunburn on toilet seats that eventually turn the white color into yellow. So, to prevent sunburn, sunlight should not directly fall on your toilet seat.


Using a toilet seat for a very long time can also cause yellow stains. So, changing a toilet seat after using it for many years is the only prevention.

Use of bleach

Sometimes, the use of bleach becomes the reason for yellow stains. Though bleach is a great disinfectant, it can discolor plastic toilet seats if the bleach is not a good one or in an undiluted state. So, trying a new brand or diluting it more before using it can be effective prevention.

How to Remove Yellow Stains on The Toilet Seat? 

How to Remove Yellow Stains on The Toilet Seat

As we have discussed the causes of yellow stains on toilet seats, now it’s time we find some solutions to our problems. Once the yellow colors are already visible, we should take quick actions to eliminate them. Let’s have a glimpse at some tips for removing yellow stains on the toilet seat. 

DIY Yellow Stains Removal

  •  Rub the sheet repeatedly with vinegar until the stains disappear. Later, wipe everything off with a clean rag. 
  • Spread a mixture of ¼ cup of baking soda and ½ cup of warm water on the dirty part of the toilet seat, leave it for 20 minutes, wash the part with a sponge, spray the surface with detergent and wipe it clean again after 10 minutes.
  • Spread a foamy paste from a ¼ cup mixture of both ingredients throughout the sheet. After 10 minutes, wipe with clean water.

Other Methods of Yellow Stain Removal

  • Sprinkle borax powder over the stains, and begin scrubbing the seat with a brush. Wash it off after 30 minutes.
  • Mix about 4 liters of warm water and one tablespoon of trisodium phosphate. Wipe the toilet seat down with the mixture.
  • If it’s a stain from overtime or a color that cannot be washed off using the above methods, you need to get rid of the old toilet seat and buy a new one.

How Often Should You Clean a Toilet?

How Often Should You Clean a Toilet

You should clean the toilet at least once to keep it free of E. Coli bacteria. However, the toilet seat needs to be cleaned after every use, and the lid should be adequately maintained and clean. 

Also, everyone must flush the toilet after using it every time. You must remember that urine is not water & if we don’t flush the toilet after urinating, it will leave stains. 

So, except for cleaning the bathroom entirely once a week, everyone should take care of the things like the seat cover or lid after every use.

Final Words

We have explained what causes yellow stains on toilet seats, the prevention methods, and what we can do to remove the colors from the toilet seats. The bacteria from urine stains can lead to odor spreading and can spread from one person to another person.

All of this can be discarded with regular cleaning and hygiene checks of the bathroom. Although buying a new toilet seat sounds easier, you must first try to clean the existing toilet seat. 

Using the ingredients at home, you can quickly get rid of the stains on your toilet seats. That’s all we have to say. Now it’s your turn to materialize. 

Frequently Asked Questions

What is Urine Scale?

Uric acid is a complex deposit of urine and rinses water combined. Over time, the urinals and the urine that collects under the urinals can form uric acid mixed with lime in hard water. 

This causes bacterial growth, clogging, and foul odors in many washrooms and in many bathrooms. Once the tile grout or pipes have penetrated the ground and clogged, it may seem impossible to get rid of the sights and odors.

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