Gnats In Bedroom – 6 Hidden Reasons And Permanent Solutions

Gnats such as fungus gnats and fruit flies are commonly associated with high moisture and decaying organic matter.

But why are gnats in your bedroom? Gnats have no reason to be there unless your bedroom is terribly moist and dirty. Right?


In this guide, you’ll find out the top six reasons for gnats in bedrooms that are swanky clean.

You’ll be pretty surprised to know the reasons. Keep reading to find out.

What Are Gnats – The Tiny Flying Insects

Gnats is a common term for tiny flies such as fruit flies, drain flies, fungus gnats, and phorid flies.

These tiny pests thrive in moist areas.

Gnats in Bedroom

Decomposing organic matter and things like rotting fruit, house plants, and wastes in the house, especially food wastes, and clogged drains draw these flies.

Sudden appearance of gnats in the house

Identifying these flies can be tricky because of their small size and black color. You can check my guide on small flies to find out how to identify them.

Reasons For Gnats In Bedroom

Gnat in the bedroom results from gnat infestation thriving in your home and yard. However, certain factors are pivotal in drawing these flies to your bedroom.

Food Particles or Food Wastes In The Bedroom

We all are guilty of munching food in our bedroom. Sometimes, we eat fruits and dispose of the fruit peels in the bedroom trash cans.

These food wastes attract gnats like fruit flies because they lay eggs.

The food stains in the bedsheets and mattresses also attract heinous pests known as bed worms.

But the worst part is that your bedroom can have gnats despite no food.

Damp Soil of House Plants

Potted Plants in Bedroom Cause Fungus Gnats

One of the reasons for gnats in the bedroom with no food source, such as food waste, is the potted plants in the bedroom.

The potting soil of indoor plants is a breeding ground for fungus gnats. Adult gnats will lay eggs in the potting soil.

These eggs hatch and produce fungus gnat larvae. The larvae is a 0.25-inch tiny white worm with a little black head.

The larvae feed on the molds and fungi that form on the damp soil. They also feed on the plant roots of seedlings, negatively impacting the plant health.

After 5-6 days of feeding on the molds, these larvae turn into pupae. 

In the pupal stage, the larvae enclose themselves in a self-made cocoon. 

They remain inside the cocoon for 4-5 days and appear as adult gnats.

A female fungus gnat can lay 100-200 microscopic eggs in the potting soil. So, when all larvae that hatch from the eggs turn into adults, you notice a swarm of fungus gnats in the bedroom.

Light Attract Gnats

The glowing light bulb in the bedroom will draw gnats. Gnats are attracted to light, and they fly towards the light source.

Gnats from other house areas will fly inside the bedroom to reach the light source.

Gnats Infestation Indoors And Outdoors

The presence of gnats in the bedroom clearly indicates active gnat infestations indoors and outdoors.

Fungus gnats will lay eggs in the decomposing organic matter and in the wet soil beds outdoors and in the potted plants.

They can also lay eggs in the indoor potted plants and in the slime choking the drains of your kitchen and bathroom.

In the same way, fruit flies will lay eggs in the bathroom and kitchen sink drains and food wastes such as rotting fruits and vegetables.

The presence of drain flies and phorid flies in the house also signify plumbing issues in the drains and even in the sewer systems. These flies too lay eggs in the wet wastes in these areas.

Other sources like rotting wastes in the compost bins, food wastes in the garbage disposals at your yard, and clogged kitchen sink drains are also the gnats’ breeding grounds.

These eggs produce larvae, which then mature into adult gnats.

That leads to severe gnat infestation. And the gnats outdoors enter the bedroom through the windows and from other areas of the house.

Moisture Issues

Leaking pipes in the bathroom, kitchen, and basement cause dampness that spreads to your entire home, including your bedroom.

Leaking Pipes Attract Gnats

The walls in the bedroom become moist, and gnats, being moisture bugs, are all attracted to wet places.

The excessive dampness in the walls, ceilings, and floors can cause cracks.

These crevices accumulate waste and can house a few dead insects, making them a place for gnats to lay eggs.

These eggs will hatch and produce larvae that mature into adult gnats.

That’s one of the reasons you suddenly notice gnats in the house.

Fruity Smell

Are there cosmetics or perfumes in the bedroom that smell fruity? If yes, you’ll have gnats like fruit flies inside the bedroom.

The fruit flies are attracted to the fruity smell that overripe fruits and vegetables produce.

Bathing in fruity-smelling soap and shower gels makes you smell fruity.

And when you smell like a fruit, because of sweet-smelling perfume, gnats follow you when you’re indoors or outdoors.

How To Get Rid of Gnats In The Bedroom

Removing the gnat sources and taking measures such as using repellents to prevent gnats are keys to eliminating gnats in the bedroom.

Here’s how you can do it –

Fix Moisture Issues

Damp areas in the house attract gnats. Leaky pipes or stagnant water issues in the home increase dampness in the house.

Fix the leaky pipes and other plumbing issues in the house to prevent the damp conditions from spreading to your bedroom.

Clean The Bedroom

Give your bedroom a thorough cleaning. Dispose of all the waste in the bedroom trash cans and wash the bedding in hot water.

Follow a regular cleaning schedule to ensure no waste accumulates in the bedroom.

And, most importantly, don’t eat in your bedroom. Eating in the bedroom causes food stains, crumbs on the bedsheets, and food waste, which can attract bugs and flies.

Clean The Drains

Clean Sink Drains To Remove Gnat Eggs And Larvae

Gnats breeding in the drain sludge will eventually spread to your bedroom. So, use a drain cleaner regularly to keep the sink drains clean.

You can also use a mixture of baking soda, white vinegar, and hot water in the drains to unclog them.

Cleaning the drains also kills the fly eggs and larvae active in the drains. Eliminating the gnats at all life cycle stages is vital for gnat control.

Treat The Soil of Potted Plants

The soil beds of indoor plants are a breeding ground for fungus gnats.

These soil beds can also become the source of fungus gnat infestations indoors.

Drench the soil beds with an equally mixed 3% hydrogen peroxide solution and water. Let the mixture sit for a couple of hours.

The hydrogen peroxide solution mixture will kill gnats, their eggs, and larvae in the soil. It also removes molds and fungi from the soil, which leads to better aeration in the soil.

Remove the soil’s upper layer to remove dead gnats and their larvae. And replenish it with fresh potting soil.

Apple Cider Vinegar Fly Trap

Apple Cider Vinegar Trap For Gnats

You can make a homemade vinegar trap with the help of apple cider vinegar and dish soap.

Fill a shallow pan or bowl with half a cup of apple cider vinegar. Add 2-3 tablespoons of dish soap and stir the mixture well.

Cover the bowl or pan with a plastic wrap and affix it firmly with a rubber band. Poke a few small holes in the wrap, and viola! You’ve your trap ready!

Keep the trap in places where you’ve noticed gnat activity. And let the trap remain there for 24 hours.

The fruity smell from the vinegar trap draws gnats. The gnats try to access the mixture by sneaking in through the holes.

The viscosity of the dish soap traps the gnats, causing them to drown in the trap.

Dispose of the mixture with dead gnats inside it the following day.

Sticky Traps

Yellow Sticky Traps To Entrap Gnats

Yellow sticky traps come in handy if you don’t have time to make the dish soap trap.

Keep the traps near potted plants, windows, and other bedroom areas where you’ve noticed gnats.

The bright yellow color draws the gnats. And when they land on the traps, they get stuck on the gluey surface.

Keep fly traps for 24 hours and dispose of them the following day.

Use Essential Oils as Repellents

There are many essential oils, such as peppermint and eucalyptus, that gnats hate. They despise the smell of these oils.

You can put a few drops of these essential oils in a diffuser or a spray bottle with water. Turn the diffuser on or spray the mixture in the bedroom to keep gnats away.

Seal The Cracks On The Windows

The cracks in the windows are entry points for gnats and many other household pests.

The gnats are fliers and crawlers that can easily sneak through tight gaps.

Seal the gaps on the windowsills with a quality sealant.

Installing window screens with meshes also helps prevent gnats from flying inside the house when windows are open.

An outdoor bug zapper near the bedroom window will lure and electrocute the gnats. It comes in handy during late spring and the entire summer.

Hire Professional Pest Control

Sever gnat infestation needs professional intervention. The source of the gnats in the bedroom can be a gnat infestation outdoors or indoors, which you have yet to spot.

Sometimes, personal efforts fail because you don’t eliminate the source of infestations.

Frequently Asked Questions

Do Gnats Bite Humans?

Gnats such as fruit flies, fungus gnats, phorid flies, and drain flies don’t bite humans.

But some biting gnat species, such as biting midges (no see ums) and buffalo gnats, can also enter bedrooms.

The females of these gnats bite and feed on human blood because they need bloodmeals to process eggs in their bodies.

The male gnats don’t bite. They feed on plant nectar.

Will Gnats Lay Eggs In My Bedroom?

Yes, gnats will lay eggs in the bedroom. Any tiny accumulated waste or dead insect in the bedroom wall voids can be the breeding ground for gnats.

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