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Home >> Pest Control >> Gnat Control

How to Get Rid of Sink Flies

Last Updated: March 6, 2025 by Maisie Kinney

Reviewed by Opal Little

Are you at a loss over how to get rid of sink flies? There’s nothing more upsetting than heading to the kitchen to cook a meal and discovering a horde of black flies hovering around your sink, drain, garbage, disposal, or trashcan. These nuisances are sink flies, also known as fungus gnats or drain flies, and they become a nightmare when they infest your home.

Sink flies seek a moist place to live and access to lots of decaying material for food. They lay eggs below the plug hole inside your drain pipe or garbage disposal and proliferate alarmingly.

Thankfully, getting rid of sink flies doesn’t have to be challenging. You’re not alone, whether you have gnats in your bathroom or elsewhere. As distressing as these insects are, they are relatively common and quickly dealt with. Explore tips for how to remove sink flies in the bathroom or kitchen with affordable and uncomplicated remedies.

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Table Of Contents
  1. How to Remove Sink Flies in the Bathroom
    • What Are Sink Flies?
    • How to Get Rid of Sink Flies With Boiling Water
    • Getting Rid of Sink Flies – White Vinegar
    • Homemade Trap for Adult Drain Flies
    • Baking Soda Spray to Kill Sink Bugs
  2. Ways to Prevent Drain Flies

How to Remove Sink Flies in the Bathroom

If there’s a cluster of minuscule insects around your bathroom or kitchen sink, you need to find out how to get rid of sink flies fast. Finding any insect in your house is discouraging, yet sink flies are not a sign of poor hygiene.

These tiny pests are lured to moisture and decaying food, and a single fly reproduces rapidly to create a full-scale invasion. Discover methods for getting rid of sink flies with boiling water, distilled white vinegar, a homemade trap, and baking soda spray.

What Are Sink Flies?

Sink flies are also known as fruit flies or drain gnats. They typically gravitate to dirty and blocked drains or stagnant water, where they find organic material to feed on. If you notice a cloud of tiny flies around your bathtub, kitchen sink, or garbage disposal, you’re likely dealing with a drain fly problem.

The fungus gnat is a tiny moth fly that reproduces quickly. If left unaddressed, sink flies proliferate and take over your bathroom or kitchen, making it an unpleasant place to be. Fortunately, there are many ways to get rid of sink flies to restore your space to order.

How to Get Rid of Sink Flies With Boiling Water

One of the simplest ways to clean gnats in the kitchen sink is to use boiling hot water. Sink flies are primarily drawn to rotting food residue and scale in your drain pipe.

Pieces of discarded food, soap scum, and mineral deposits from your faucet water build up and line your drain pipe. Together, these provide ample food and an environment for drain flies to feast and lay their eggs. Eliminating the grime inside your pipes kills fruit fly eggs and breaks the life cycle.

Boil an electric kettle or heat a medium pan of water on the stove until boiling, and pour it slowly down your plug hole. Wear thick heatproof gloves to protect your hands from the boiling water, and be aware it could spray or splash back.

Add a few squeezes of liquid dish soap to the water to help dissolve stubborn buildup. Repeat the boiling water treatment once daily until no signs of fruit flies are observable.

Getting Rid of Sink Flies – White Vinegar

The moisture and debris inside your drain pipes create an ideal environment for sewer flies to feed and reproduce. Choosing the right drain cleaner is essential for removing sink flies in the bathroom.

If your bathtub, sink, or garbage disposal attracts flies, use natural ingredients like baking soda and distilled white vinegar to clean them out.

Pour a half box of baking soda powder down the drain or garbage disposal, followed by eight ounces of white vinegar. The baking soda and vinegar react in a physical and chemical reaction, which loosens rotting food and eggs.

Give the cleaner 20 minutes to work before running the hot faucet to wash the waste away. Repeat this cleaning every day until the fruit flies are gone.

Homemade Trap for Adult Drain Flies

While drain cleaning takes care of eggs, a homemade trap is a great way to eliminate adult flies from your kitchen or bathroom. Avoid chemical drain fly control, and filter flies into this simple trap for easy removal. This trap requires only a few ingredients and is quickly reset to use it repeatedly.

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DIY Sink Fly Trap

  • Plastic wrap
  • Rotten fruit pieces
  • Toothpick
  • Bowl
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Build a trap by setting a piece of rotten fruit inside the bowl to act as bait. Completely cover the bowl with plastic wrap and poke dozens of small holes in the top with a toothpick. The sink flies smell the rotting food and move away from your sink and toward the trap.

The flies pass through the tiny holes in the plastic wrap to eat the fruit but cannot get back out. Check the trap daily and release the fruit flies outside by removing the plastic wrap. Bait the trap and cover it with new plastic to use it again. If you don’t have rotten fruit, fruit juice or ripe fruit works just as well.

Baking Soda Spray to Kill Sink Bugs

Many commercial fly sprays are available, though they typically contain harmful substances that we don’t want to spray in our food preparation or bathing zones. We wash utensils and dishes in the kitchen sink, making safety paramount.

Baking soda combines with liquid dish soap to remove sink flies without using dangerous compounds you wouldn’t want near your food. Make your own straightforward and natural sink fly spray to eradicate pests without risking your health.

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Sink Fly Spray

  • 2 tbsp baking soda powder
  • 1 gallon of warm water
  • 1 tbsp liquid dish soap
  • Spray bottle
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Measure and transfer the ingredients into the spray bottle and shake well to blend. Spray the liquid near your sink and into the air to destroy sink flies.

Use the baking soda drain fly spray whenever you notice bugs in your kitchen or bathroom for the best results. Combine the spray with a drain-cleaning technique to eliminate eggs and adult flies.

Ways to Prevent Drain Flies

A drain fly infestation is a significant inconvenience. Once you’ve gotten rid of the flies from your kitchen or bathroom, preventing them from returning is vital. Consider setting a schedule and cleaning your sink drain, pipes, and garbage disposal. Aim for at least once a month and clean more frequently if drain fly issues re-emerge.

Clean up rotting food and use a trashcan with a lid to limit the food sources available for fungus gnats. Wash your dishes regularly and avoid leaving dirty dishes in the sink as the food remnants draw sink flies. Be vigilant about your fruit bowl and throw away decaying fruit promptly so it doesn’t become a sink fly attractant.

Did this article answer your questions about how to remove sink flies in the bathroom? Drain cleaning is vital to avoid expensive water heater and plumbing service costs, and it’s also beneficial for keeping sink flies at bay. Dirty drains, rotting organic matter, and standing water bring sink flies to your home.

If you spot a cloud of little black insects hovering over your plug-hole or garbage disposal, don’t panic. Having sink flies does not mean you’re dirty.

These insects are a common problem and are efficiently handled with the right strategies. Begin treatment when sink flies appear to oust them before they reproduce, and restore your kitchen and bathroom to relaxing spaces.

A drain fly infestation is distressing. Fortunately, a combination of drain cleaning and traps typically resolves the issue. Sewer flies are drawn to standing water and rotting food. Get rid of the pests with boiling water, baking soda spray, vinegar, and more. #get #rid #sink #flies
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If you loved this helpful article on how to get rid of sink flies, please share it with your friends and family who are getting rid of sink flies on Pinterest and Facebook.

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