What Causes Gnats to Enter the House?

Reviewed on 12/22/2020

3 Main causes of gnats to enter the house

Factors that create a suitable environment for gnats are the same for many insects and pests, such as the presence of preferred sources of food, moisture, protection, and decomposing organic matter. Sources of gnats’ invasion have to be eliminated to get rid of them. Causes of gnats’ invasion include:

  • Moist soil: Moist soil is an ideal habitat for fungal gnats. They thrive in mulch, moist soil, and sometimes even in infested earthen pots.
  • Decomposing organic matter: Wastes and sewage from faulty pipes and drains that cause organic wastes to accumulate in the soil are a breeding ground for gnats.
  • Moist organic matter: Fruit flies and moth flies are attracted to over-ripe fruits and vegetables.

Ways to get rid of gnats

There are multiple ways to get rid of gnats using commercial products and natural non-toxic home remedies. Some effective ways to get rid of gnats include:

  • Homemade gnat repellent spray: A mixture of dish soap, water, baking soda, and vinegar can be filled into a spray bottle. The mixture should contain a few drops of dish soap, a tablespoon of vinegar, and baking soda per cup of water. A few sprays of this mixture is an effective gnat repellent. They may be sprayed in areas where gnats are commonly seen, such as around plants, in the bathrooms, etc.
  • Potato chunks: You can place raw potato chunks in the soil around earthen pots. Potatoes are very attractive to fungus gnat larvae. This trick will trap the larvae away from plant roots. After a few days in a pot, you can remove infested potato chunks and replace with fresh pieces.
  • Sticky traps: You can purchase sticky traps available at retail nurseries and garden centers. Yellow sticky traps can be cut into smaller squares and stuck over the wooden skewers and flowerpots. Gnats sit over them and are stuck.
  • BTI or Gnatrol: This is a naturally occurring fungus that is toxic to gnat larvae. This can be applied over your potted plants repeatedly for gnat control. It is non-toxic to humans and available in nurseries.
  • Homemade gnat killer spray: A mixture of half a cup of water, half a cup of isopropyl alcohol, and a teaspoon of dish liquid can be filled in a spray bottle. This mixture can be sprayed on the gnats directly to kill them.
  • Apple cider vinegar gnat trap: A few tablespoons of apple cider vinegar, a few drops of dish soap, and a tablespoon of sugar can be mixed in a bowl and placed in an area where gnats are commonly seen such as the kitchen, bathroom, or indoor garden. Sugar and apple cider vinegar attracts gnats; dish soap traps the gnats and causes them to drown.
  • A gnat fruit trap: Rotting fruits may be placed in a jar covered with a perforated plastic wrap. Gnats get attracted to the rotten fruits, enter the jar, and get stuck inside, unable to escape.
  • Diluted bleach down the drains: If gnats are commonly seen around the kitchen sink or bathtub, a cup of diluted bleach may be poured down the drains to kill the gnats.
  • A candle trap: A candle should be placed in a candle stand, and the candle stand should then be partially filled with water. The candle should be lit, and the lights should be turned off. Gnats get attracted to the flame, get burned, or fall into the water and drown.
  • Professional pest control: If home remedies and commercial products fail and there is a serious gnat infestation in the house, a professional pest control company can help address the problem by creating a customized treatment plan for the home.

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