If you notice the caulk around the base of your toilet start to turn brown, it means your toilet has a wax ring which is leaking. As a result, human waste especially urine is decolorizing the normally white caulk. The solution to this is to remove the toilet and put a new wax ring.
You could try toilet bowl cleaner, that's pretty much just bleach in a thick gel form. I also just put bleach in a spray bottle and spray on the caulk and leave it, this generally works too :)
Yellowing Caulk - Discoloration or Degradation from UV
In some cases, caulk can degrade or crumble over time, moreso when exposed to extreme temperatures or moisture. This can result in sealant failure and costly reapplication. Yellowing caulk can even be observed on interior jobs that are exposed to UV regularly.
The most common deposit on toilets is calcium carbonate (referred to as limescale), from water that has passed through chalk or limestone rocks. It's usually light brown/beige in colour. If it's stained with iron from water that goes through iron bearing rock,it will be darker.
Hydrogen peroxide. Plain ordinary type purchased at drug store for about $1. Leave it in overnight. Then use any ordinary toilet cleaner and brush to clean. Repeat if necessary. (One time use will also make a BBQ grill surface like new. Like new. Works on my porcelain kitchen sink too. )
If you notice the caulk around the base of your toilet start to turn brown, it means your toilet has a wax ring which is leaking. As a result, human waste especially urine is decolorizing the normally white caulk. The solution to this is to remove the toilet and put a new wax ring.
Pour half a bottle of vinegar essence into the toilet bowl in the evening and leave it to work overnight. The next morning, you will be able to easily clean off any urine scale, thanks to the acetic acid it contains. You can also use this method to remove urine stains in toilet bowls and pipes.
For older stains, using an industrial-strength cleaner like CLR should do the trick. Another less conventional strategy you can try is removing the stains with Coca-Cola. To do this, simply pour a full can of Coke into the toilet and let it sit in the bowl overnight. Then flush the toilet the next day.
Hard water stains can be pretty common in your toilet bowl. And while your first thought might be to treat them with Clorox® Disinfecting Bleach to remove the stains, we don't recommend it in this case.
Whiten Caulk with Bleach
Mix equal parts bleach and water in a spray bottle and spray it onto the caulk. Let it sit for a few hours, then scrub the caulk with a brush. Rinse thoroughly with water to remove any residue. Be sure to wear gloves and work in a well-ventilated area when using bleach.
For water-based caulks, begin by soaking a towel or washcloth with warm water. Then, apply the warm water to the existing caulk. This process will serve to soften the caulk and make it easier to remove. For a silicone-based caulk, do the same thing but with acetone or denatured alcohol for better results.
Tackling Discoloration in Silicone
Fill a container with hydrogen peroxide. Submerge the discolored silicone item. Let soak for 24 hours.
Both provide a long-lasting seal where your toilet meets the floor. Ease of Cleaning: If you want to keep track of cleaning needs, white caulk makes dirt and wear more visible. Clear caulk is better suited for those who prefer a low-maintenance, discreet seal.
Cleaning silicone sealant: mould and mildew remover
These are available from most DIY stores and supermarkets. Check the product's instructions and use as directed. You might see vinegar, a combination of baking soda and vinegar or bleach recommended as cleaning solutions for silicone sealant elsewhere.
Brown stains in a toilet bowl are often caused by rust, which can be due to iron in the water, hard water deposits or old pipes. The stains can also be caused by calcium or mineral deposits.
Customers say the Zep Calcium, Lime, and Rust Stain Remover is an effective and cost-efficient alternative to more expensive brands like CLR. Many users appreciate its ability to tackle tough stains, particularly in toilets and on various surfaces affected by hard water.
Use vinegar and baking soda to clean toilet bowl stains. This mix creates a reaction that lifts stains well. It's also good for the planet and safe for your family.
Get rid of toilet rings with magic erasers
Cut off a quarter of a magic eraser and drop it into the toilet water. Let the piece sit in your toilet overnight to work its… well, magic! Do not flush the magic eraser down the toilet ! Remove it in the morning, then flush to rinse away any residue.
Brown stains under the toilet rim are often caused by a combination of scale and urinary stone. There can also be a build-up of deposits deeper inside the toilet, where toilet water remains.
Calcium or Mineral Deposits: Brown, Black, Orange, Red and Grey Rings Calcium and mineral deposits can also cause nasty toilet bowl stains. The concentration of magnesium and iron dissolved in the hard water can make your toilet look dirty and grimy.
(This clears buildup from the toilet bowl ring, so that the vinegar and baking soda can work directly on the stain.) Pour 1 cup vinegar into the bowl. Let sit 10 minutes. Add 1 cup baking soda, paying close attention to the toilet bowl ring.
Using this method regularly can help keep your toilet clean and hygienic. Additionally, you should use bleach or other cleaning products for tougher stains or odors. However, it's important not to leave the vinegar in the toilet overnight as it can damage the porcelain and reduce its lifespan.