Drying clothes indoors can increase the risk of mould, especially in poorly ventilated spaces—but the “15-minute trick” mentioned in headlines like this is usually about quick ventilation to control moisture.
🧺 Why indoor drying can cause mould
When wet clothes dry, they release moisture into the air. This can:
- Raise indoor humidity
- Lead to condensation on walls/windows
- Encourage growth of mould (a type of fungus)
Mould thrives in damp, warm, and poorly ventilated environments.
⏱️ The “15-minute trick” (what it really means)
The simple idea is:
👉 Open windows wide for 10–15 minutes (cross-ventilation if possible)
Why it works:
- Quickly replaces humid indoor air with fresh air
- Reduces condensation buildup
- Helps clothes dry faster and more safely
This is often called “shock ventilation”—short but effective airing instead of leaving windows slightly open all day.
🌬️ How to do it properly
- Open windows on opposite sides of the room (if possible)
- Do it once or twice during drying
- Combine with a fan or airflow if needed
- Close windows after 15 minutes to retain heat
🛡️ Extra Tips to Prevent Mould
- Dry clothes in a well-ventilated room, not bedrooms if possible
- Keep clothes spaced out, not piled together
- Use a dehumidifier if humidity is high
- Avoid drying directly on radiators (can trap moisture indoors)
- Wipe condensation from windows regularly
⚠️ Important Note
This trick helps reduce moisture, but it’s not a complete solution if your home already has:
- Persistent damp problems
- Poor insulation
- Existing mould growth
✅ Bottom line:
The “15-minute trick” works because brief, strong ventilation removes excess moisture quickly, helping prevent mould when drying clothes indoors.
If you want, I can show you how to tell if your room humidity is too high (with simple signs or tools) or give a full anti-mould routine.
