Those tiny flies that appear around your kitchen or bathroom sink are usually not random visitors. In many cases, they’re completing their life cycle in or near the drain—fed by buildup, moisture, and organic material.
While the exact species can vary, the pattern is similar: adults emerge, you notice them around the sink area, and then the problem returns unless the breeding conditions are removed.
Why sink drains attract small flies
Most drain-associated “sink flies” thrive in damp, nutrient-rich environments. Over time, organic residue from food particles, grease, soap scum, hair, and toothpaste can form a slippery biofilm inside pipes. Even if the sink surface looks clean, that layer can keep producing conditions for eggs and larvae.
Moisture is the other key ingredient. A slow-draining sink or one that’s frequently left with standing water creates a habi
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Added:
admin 10/12/2026
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Drain cleaning»
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