Overview
- Condensation forms when warm, moist indoor air hits cold glass, and persistent moisture raises the risk of mould growth and damage to frames and seals.
- Experts recommend short, wide-open airing for 5–10 minutes several times a day, noting that permanently tilted windows deliver poor exchange and can cool walls.
- Keep little-used rooms at about 16 °C and lived-in rooms warmer, wipe droplets promptly, vent immediately after cooking or showering, space large furniture off exterior walls, and check window seals regularly.
- A thin, invisible film of ordinary dishwashing liquid rubbed onto clean glass lowers water’s surface tension, reducing fogging for several days and allowing quick reapplication; mild laundry detergent can also work.
- Track humidity with a hygrometer and aim for roughly 40–60% indoors (bathrooms may run higher), consider a dehumidifier if levels stay elevated, and seek professional assessment for insulation, frame or ventilation faults if condensation persists.