It is also often recommended to ventilate the bathroom well. Constant humidity greatly encourages the presence of these insects. Opening windows, using an extractor fan, and drying damp surfaces after showering can make a big difference.
There are also home remedies to temporarily reduce the number of adult flies, such as placing containers filled with apple cider vinegar and a few drops of liquid soap near the drain. While these traps help reduce the number of visible insects, they are not a substitute for a thorough drain cleaning.
In some cases, the continued presence of these flies can indicate more serious problems, such as internal blockages, hidden leaks, or damage to the pipes. If the water drains slowly, a foul odor persists, or flies appear in different parts of the house, it’s best to consult a professional.
The appearance of drain flies doesn’t always indicate a serious problem, but it does signal excessive moisture and a buildup of debris. Regularly cleaning drains, checking pipes, and ensuring good ventilation are simple measures that can prevent these curious insects from establishing a permanent presence in the bathroom.