Sometimes it’s hard to tell what’s causing that musty odor to come from under the sink. This is particularly problematic if the smell has been present for some time and has yet to be adequately addressed. 

You may eliminate the musty odor by fixing one of several possible sources of this widespread problem. 

In this article, we’ll go over some of the most prevalent causes of “under sink cabinet smells musty” and some recommendations for how to fix the problem.

7 Reasons for Musty Smell Under Sink Cabinet

The musty odor coming from below the sink could be caused by any one of the following seven things:

1. Leaky Pipes

Water accumulation from a leaking or clogged pipe is a perfect environment for mildew and mold growth. This can cause the space under your sink to develop a musty odor. You can fix the problem by ensuring that all pipes are securely linked and there are no leaks.

2. Excess Moisture

Air moisture accumulates in closed spaces like sink cabinets, encouraging mold and bacteria growth. Use a fan or dehumidifier to move the air in your closet and reduce the humidity level.

3. Poor Ventilation

A musty odor may develop if moisture is trapped inside the cabinet because of a lack of ventilation. Make sure your cabinet has adequate airflow and that it is built correctly. You can further assist in drying out the cabinet by installing a fan or some other venting device.

4. Unsealed Surfaces

Moisture can leak through unsealed cabinet surfaces, encouraging the growth of mold and mildew. Make sure the surface of your cabinet is sealed correctly to avoid this.

5. Poor Drainage Design

If the drain isn’t installed correctly, water might collect under the sink, creating a musty environment where mold can thrive. Make sure water flows smoothly by modifying your drain’s layout.

6. Infrequent Cleaning

A musty odor might develop if dust and filth are allowed to build up in the space under your sink. Regular cleaning will keep the area clear of dust and dirt, preventing this problem.

Under Sink Cabinet Smells Musty

7. Pest Infestation

Bacteria can be carried and transmitted by rodents and insects, including cockroaches, mice, and rats, resulting in a musty odor. To avoid this, the area must be well-sealed so that pests cannot enter.

11 Simple Ways to Get Rid of Musty Smell Under Sink Cabinet

If you’re sick of the musty odor emanating from your sink cabinet, try one of these 11 easy solutions:

1. Check Pipes and Drains for Leaks

Ensure there are no leaks in the pipes or drains, as this might cause water to pool and encourage the formation of mildew and mold, producing a musty odor.

2. Use a Dehumidifier

A dehumidifier can help prevent mildew and mold growth in a damp and humid environment by removing excess moisture from the air.

3. Install a Ventilation Fan

You can keep air flowing and the moisture level down in your sink cabinet by putting a fan for ventilation in the sink cabinet.

4. Seal Porous Surfaces

Keep moisture out of your cabinet by sealing any porous surfaces it has. This will prevent a musty odor from developing.

5. Clean Regularly

To avoid bugs and musty odors, at the very least, you should clean the space under your cabinet once a month.

6. Use a Vinegar Solution

To eliminate mold and mildew, mix one part vinegar with two parts water, then spray it over the affected areas. Vinegar, a common household ingredient, is a natural disinfectant and deodorizer.

7. Use Baking Soda

Baking soda has been shown to neutralize stale air effectively. You can treat the damaged area by sprinkling baking soda, waiting a few hours, and then vacuuming it.

8. Use Activated Charcoal

You can eliminate musty odors from the space under your sink cabinet with the help of activated charcoal, which is an efficient odor absorber. The charcoal can absorb the scents if you put it in a shallow bowl and set it near the affected area.

9. Remove Standing Water

Mold and mildew can form in stagnant water, creating a musty odor. To avoid this, check the plumbing connections and ensure water is not collecting in the space under the sink cabinet.

10. Use Essential Oils

Natural deodorizers like lavender and lemon essential oils can freshen up the space under your sink. Simply dab an absorbent cotton ball or cloth with some essential oils and hold it close to the affected area.

11. Get Rid of Pests

Rats, cockroaches, and mice can transmit bacteria, leaving an unpleasant musty odor behind. Ensure your cabinet’s doors and drawers are properly sealed so pests can’t enter.

What’s Causing That Bad Smell Under My Kitchen Sink?

If you have one, you may thank your garbage disposal for this. Sometimes a garbage disposal will become clogged, causing a foul odor to emanate from the area beneath the sink. 

Under Sink Cabinet Smells Musty

Keep your garbage disposal in good working order by cleaning it often with hot water and dish soap. Emptying and cleaning the sink cabinet regularly can also help eliminate musty smells.

Is Mold the Only Possible Cause of That Musty Odor?

No. Several different things, including an abundance of moisture, a lack of ventilation, or unsealed surfaces, can cause musty odors. 

If you notice a musty odor, immediately check the space under your sink cabinet to determine its origin. 

You can avoid musty smells with regular cleaning and upkeep of the sink area.

Why Does The Bottom Of My Sink Smell?

There are many potential causes of an unpleasant odor at the base of your sink, including insufficient ventilation, improperly sealed surfaces, pest infestations, and infrequent cleaning. 

These conditions are conducive to the growth of mold and bacteria, which can result in a musty odor. 

If you smell something unpleasant, check under your sink cabinet regularly to locate the source. As an added measure, routine cleaning and upkeep can keep things smelling fresh for the long haul.

Does Vinegar Eliminate Odors?

Yes. You can use vinegar to eliminate musty odors in the space under your sink. If mold or bacteria is in the area, you can eliminate it by pouring a solution of equal parts vinegar and water down the sink drain. You can neutralize the scents by placing a bowl of white vinegar under the sink cabinet.

How Much Time Should Vinegar Be Left in a Sink?

The vinegar must sit in the sink for at least 20 minutes for the optimum results to appear. The vinegar can effectively disinfect, deodorize, and dissolve any debris or blockages in the area. 

After 20 minutes, run hot water into the drain to remove the vinegar and other lingering odors. Keep the area clean and well-maintained to keep the area free of musty smells in the future.

Can Musty Odors Be Eliminated With Baking Soda?

Yes. You can neutralize the musty scents lingering under your sink with baking soda because it’s a natural deodorizer. You can sprinkle it on the affected region and leave it there overnight. Vacuum it up the next day.

How Do I Find The Source Of A Musty Smell?

It might be challenging to track down the cause of a musty odor, but doing so is necessary before any remediation can begin. Check for leaks and water damage if your sink cabinet has a musty odor. 

If you can’t find any apparent symptoms of water damage, look for mold and discoloration near the sink cabinet’s edges and the flooring’s corners. 

You should also check for pest infestations in the space behind your sink cabinet, as they could be the source of the musty odor. Call in the experts if you’re having trouble tracking down the smell.

You need to clean and maintain your sink, the cabinet, and the area around it once you’ve determined the source of the musty odor. You can use natural deodorizers like white vinegar and baking soda to further remove odor. 

Maintaining your sink cabinet’s routine cleaning and maintenance schedule will help keep musty smells at bay.

Remember that to make your home a healthy and safe place for your family, you must first find the source of the musty odor and get rid of it. If you take the proper precautions, you should be able to prevent the reappearance of musty smells.

Why Does My Sink Smell Like Mildew?

Mildew is the predominant odor from the sink due to the high humidity, lack of air circulation, and lack of sealing. Mildew, a fungus, is a common source of musty odors.

To find the source of the odor and get rid of it, regularly check the area beneath your sink cabinet. If the drainage system is poorly designed, bacteria or mold could flourish, causing unpleasant odors.

What Does Mildew Smell Like?

Mildew often smells earthy and musty. Multiple factors, including water damage, unprotected surfaces, and pest infestations, can contribute to the stench, making it difficult to pinpoint its origin. 

However, if you detect a musty, stale, or earthy odor somewhere in your house, it may result from mildew.