If your toilet still smells after cleaning, the cause may be bacteria hidden around the toilet base, a dirty toilet brush or drain, a dry trap, a damaged seal, poor ventilation, or a problem with the drainage system. Cleaning the visible surfaces may not be enough if the source of the smell is hidden.

You Clean the Toilet… So Why Does It Still Smell?

You clean the bowl, wipe the seat, disinfect the surrounding surfaces and yet, a few hours later, the unpleasant smell is back.

This can be frustrating, especially when the toilet looks perfectly clean.

The important thing to remember is that a bad smell does not always come from the visible part of the toilet bowl. The source may be hidden underneath the toilet, inside the drain, around the base or even in the plumbing system.

Here are the most common causes.

Why Does My Toilet Smell Even After Cleaning?

1. Bacteria and Dirt Are Hidden Under the Rim

Traditional toilets have a rim around the inside of the bowl. This area can be difficult to clean properly, allowing bacteria, mineral deposits and other residues to build up over time.

Even if the visible part of the bowl looks clean, hidden deposits can contribute to unpleasant odours.

A rimless toilet has a different bowl design without the traditional concealed rim. This makes the inside of the bowl easier to access during cleaning and reduces the number of hidden areas where dirt and deposits can accumulate.

However, a rimless toilet still needs regular cleaning. No toilet design is completely maintenance-free.

2. The Toilet Base May Have a Damaged Seal

If the smell seems strongest around the bottom of the toilet, the problem may not be inside the bowl.

A damaged or deteriorated seal between the toilet and the waste pipe can allow unpleasant sewer gases to escape.

You may notice:

• A persistent sewage smell around the base.
• Dampness near the floor.
• A smell that returns quickly after cleaning.
• In some cases, water leaking around the base.

If you suspect a damaged seal, professional inspection is recommended.

3. The Toilet Trap May Be Dry

The water that remains inside the toilet bowl is not there by accident.

It forms a water seal that helps prevent sewer gases from entering the bathroom.

If the water level is unusually low or the toilet is rarely used, the trap may not provide an effective seal. This can allow unpleasant smells to enter the room.

If the toilet is not used regularly, flushing it occasionally can help maintain the water seal.

4. The Toilet Brush or Cleaning Tools May Be the Source

Sometimes the toilet itself is not the problem.

A wet toilet brush placed inside a closed container can quickly develop a strong smell. Bacteria and moisture can accumulate inside the brush holder and create an unpleasant odour.

If the smell is strongest near the toilet brush, clean or replace it and wash the holder thoroughly.

5. Poor Bathroom Ventilation

A bathroom with insufficient ventilation can retain moisture and odours for a long time.

This is especially common in bathrooms without windows or with an extractor fan that is not working effectively.

Good ventilation helps remove:

* Humidity.
* Unpleasant odours.
* Airborne particles.
* Moisture that can contribute to mould growth.

If the smell becomes stronger after showering, poor ventilation may be part of the problem.

How to Find Where the Smell Is Coming From

Before using more cleaning products, try to identify the source.

Check the toilet bowl

Is the smell coming directly from the bowl, even after cleaning?

Check around the base

Is the smell stronger near the floor?

Check the toilet brush

Does the odour seem to come from the brush or its container?

Check the ventilation

Does the bathroom remain damp or smell musty for a long time?

Identifying the source is often more useful than simply cleaning the toilet repeatedly.

When Should You Call a Plumber?

Professional help may be needed if:

• The smell is strongly similar to sewage. The smell is strongest around the toilet base.
• You notice water leaking onto the floor.
• The toilet moves or rocks slightly.
•  The smell continues despite thorough cleaning.
• Several drains in the bathroom smell at the same time.

These signs may indicate a problem with the toilet seal, drainage system or ventilation rather than a simple cleaning issue.

Can a Modern Toilet Help Reduce Odours?

A modern toilet design can make cleaning and maintenance easier, but it cannot solve every odour problem.

For example, the rimless design used in modern toilets eliminates the traditional hidden rim inside the bowl. This can make the bowl easier to clean and reduce areas where dirt and mineral deposits may accumulate.

However, if the smell is caused by a damaged waste pipe seal, a dry trap or a ventilation problem, replacing the toilet alone will not solve the underlying issue.

The best solution is always to identify the actual source of the smell first.

Frequently Asked Questions

Why does my toilet smell like sewage after cleaning?

The smell may be coming from a damaged seal, a dry trap or a problem with the drainage system rather than the toilet bowl itself.

Can a dirty toilet brush make the bathroom smell?

Yes. A wet toilet brush and its holder can collect bacteria and develop a strong unpleasant odour.

Does a rimless toilet prevent bad smells?

Not completely. However, the absence of a traditional hidden rim can make the bowl easier to clean and reduce areas where dirt and deposits may accumulate.

Why does my toilet smell worse when it is not used?

If a toilet is rarely used, the water seal in the trap may dry out, allowing sewer gases to enter the bathroom.

Why does the smell come back after cleaning?

If the source is hidden under the toilet, inside the drain or related to ventilation, surface cleaning will only temporarily mask the problem.

 

A toilet that smells even after cleaning is not necessarily a sign that the bowl is dirty.

The smell may come from hidden bacteria, a toilet brush, poor ventilation, a dry trap or a damaged seal beneath the toilet.

The most effective approach is to identify where the smell is coming from rather than repeatedly using stronger cleaning products.

Regular cleaning remains important, and a rimless toilet can make the bowl easier to access and maintain. But when the smell resembles sewage or returns quickly after cleaning, the cause may be a plumbing issue that requires a closer inspection.