The main reasons for dryer vent cleaning:
- Fabrics taking forever to dry
- Potential lint fires
- Higher utility bill
Water damage inside walls from blockages and nowhere for the moisture to go. Clothes dryers require an open pathway to vent the hot air, moisture and gases resulting from drying clothing.
This pathway, the dryer duct, can become blocked by lint accumulation due to any of several factors - normal lint build-up over time, duct too narrow, duct too long, too many turns, etc. Sometimes there can be a mechanical blockage such as a bird nest in the duct.
In any case, the duct must be cleaned in order to exhaust the approximate two to three litres of water per average laundry load.
Most dryer manufacturers, such as Maytag, recommend that residential dryer ducts be cleaned annually for fire-prevention and energy-saving reasons.