Gnats in your house are primarily caused by the presence of moisture and decaying organic matter, which provide ideal breeding and feeding grounds for these pests.

Main Causes of Gnats in the House

• Overwatered Houseplants: Fungus gnats are especially attracted to moist soil where fungi grow. Overwatering plants creates damp soil that serves as a perfect breeding site for their larvae

• Decaying Organic Material: Gnats, including fruit flies, are drawn to rotting fruits, vegetables, and other decomposing organic matter. Forgotten or overripe produce, food leftovers, and residues in drains or trash cans offer abundant food and breeding sites

• Excess Moisture: Leaking pipes, damp sponges, clogged drains, and standing water in places like plant trays or bathrooms create moist environments that attract gnats

• Garbage and Trash Cans: Trash containing decomposing food and organic waste, especially if not sealed or emptied regularly, is a common gnat attractant and breeding ground

• Open Doors and Windows: Gnats can enter homes through open doors, windows, or small cracks, especially during warmer months, attracted by indoor lights or food scents

• Infested Materials: Sometimes potting soil or produce brought into the home already contains gnat eggs or larvae, introducing them indoors

• Fruit-Scented Products: Gnats can also be attracted to fruit-scented hygiene or beauty products due to their sweet aroma

In summary, the key factors causing gnats in your house are moisture, organic decay, and accessible food sources. Managing watering of plants, promptly cleaning food residues, sealing trash, fixing leaks, and preventing entry can reduce gnat infestations effectively