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  • Writer's pictureBecka

How to Clean Your Sink to Get Rid of Flies and Gnats for Good

Are you tired of battling flies and gnats in your bathroom? These pesky insects can be a nuisance, especially when they seem to congregate around your sink. Luckily, with a few strategic steps, you can eliminate these unwanted guests and keep them from coming back. Here’s a comprehensive guide to help you reclaim your bathroom from flies and gnats.

a bathroom sink with flies

1. Clean the Drain Thoroughly

Flies and gnats often breed in the organic matter that accumulates in your drain. To eliminate their breeding grounds, a thorough cleaning is essential.

Boiling Water

Pouring boiling water down the drain is a simple yet effective way to kill any larvae and flush out debris. Do this regularly to maintain a clean drain.

Baking Soda and Vinegar

Create a natural cleaning solution by pouring 1/2 cup of baking soda down the drain, followed by 1/2 cup of vinegar. Let the mixture fizz for about 10-15 minutes, then flush with boiling water. This not only cleans the drain but also helps to eliminate odors.

Commercial Drain Cleaner

For a more powerful clean, you can use a commercial drain cleaner. Follow the instructions carefully to ensure safe and effective use. Be mindful of the potential for chemical fumes and always ventilate the area properly.

2. Use Traps to Catch Adult Flies and Gnats

While you work on eliminating the source, traps can help reduce the adult fly and gnat population.

Apple Cider Vinegar Trap

Fill a small bowl or jar with apple cider vinegar and add a few drops of dish soap. The vinegar attracts the flies, while the soap breaks the surface tension, causing them to drown.

Wine Trap

If you have leftover wine, use it to make a similar trap. Pour some wine into a glass and add a few drops of dish soap. The flies are attracted to the wine and meet the same fate as with the vinegar trap.

Sticky Traps

Place sticky fly paper near the sink to catch flying insects. These traps are effective and easy to use.

3. Maintain Regular Cleaning

Prevent future infestations by incorporating regular cleaning and maintenance into your routine.

Regular Flushing

Periodically pour boiling water down the drain to keep it clear of organic matter and potential breeding grounds.


Use a brush to scrub the sink and drain to remove any buildup. Pay special attention to areas around the drain cover and in crevices where debris can accumulate.

Garbage Disposal Care

If you have a garbage disposal, ensure it is clean. Grind ice cubes and lemon peels to clean and freshen it, which also helps to eliminate odors that can attract pests.

4. Seal Cracks and Leaks

Gnats and flies can enter through small cracks or gaps. Sealing these entry points can help keep them out.

Seal Cracks

Inspect your bathroom for any cracks or gaps around the sink. Use caulk to seal these areas, preventing insects from finding their way in.

Fix Leaks

Ensure there are no leaks under the sink. Standing water can attract pests, so fixing leaks promptly is crucial for pest prevention.

5. Reduce Moisture

Gnats thrive in moist environments, so reducing moisture is key to keeping them at bay.


Ensure your bathroom is well-ventilated. Use an exhaust fan or open a window to reduce humidity, which discourages gnats from settling in.

Dry Sink

After using the sink, wipe it dry to minimize moisture. This simple habit can make a big difference in preventing gnats from taking up residence.

a bathroom sink filled with water

By following these steps, you can effectively eliminate flies and gnats from your bathroom sink and keep them from coming back. Regular cleaning, proper maintenance, and preventive measures are key to maintaining a gnat-free bathroom. Say goodbye to these pesky insects and enjoy a clean, fresh bathroom!

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