Drying laundry indoors can raise room humidity levels by as much as 30%, according to several studies. This increase in humidity can lead to the growth of mold and dust mites, which are known to cause coughing and respiratory irritation, especially during autumn. The practice of drying clothes indoors is common when outdoor conditions are unfavorable, such as during rain, and often involves hanging laundry near radiators, in living rooms, or bedrooms without considering the potential consequences. As wet laundry dries, it releases water into the surrounding air, significantly increasing humidity levels. A single load of laundry can contain several liters of water, which, instead of evaporating outside, becomes trapped indoors, contributing to a more humid environment. Mold and dust mites thrive in these conditions. Mold tends to grow in damp, poorly ventilated areas such as corners, cold walls, or near windows, releasing spores that can irritate the respiratory system. Dust mites, on the other hand, multiply in humid air, especially in places like bedding, carpets, and clothing. This explains why some people experience persistent coughing during autumn, even without signs of a cold. While the air may look clean, it can be filled with invisible irritants that affect the bronchi and sinuses. To address this issue, experts recommend regularly ventilating rooms where laundry is being dried. Even brief periods of opening windows a few times a day can help reduce humidity, even in cold weather. In homes with poor ventilation or insulation, using a dehumidifier can be highly effective. Other suggestions include drying laundry in a bathroom or a dedicated space rather than in living areas, wringing out clothes as much as possible before hanging them, ventilating rooms in the morning and evening, and avoiding drying multiple loads of laundry at once in enclosed spaces. These steps can help reduce mold growth and improve indoor air quality over time. This phenomenon illustrates how everyday household habits can significantly impact health, often going unnoticed despite their direct effects. Autumn, with its tendency to keep windows closed and increase indoor heating, can expose these hidden imbalances. It also encourages people to reevaluate their routine behaviors to improve the air quality in their homes. By making small changes, individuals can create a healthier living environment, especially during the colder months.