Small moth fly (drain fly), likely

Moist indoor sites, especially sink, shower, and drain interiors; adults rest on nearby walls and windows.

Larvae consume decomposing organic matter and microbial biofilm in drain sludge. Adults feed little, sometimes taking moisture or sugary liquids.

Weak, erratic fliers with fuzzy, moth-like wings; often emerge from plumbing and are most active around dusk. Several generations may develop in damp drain buildup.

Generally harmless and do not bite or transmit significant disease, though large numbers indicate dirty or persistently damp drains. Larvae help decompose organic material.