Warning Signs that your Dryer Duct needs cleaning.

• Dryer is still producing airflow, no heat. It takes longer and longer to dry clothes, especially towels and jeans or any other article of clothing.
• Clothes are damp or hotter than usual at the end of the cycle.
• Outdoor flapper on vent hood doesn't open when dryer is on.
• Airflow in the vent seems low.

There were 27,400 clothes dryer fires in the U.S. in 2007, resulting in 39 deaths, 248 injuries and property loss estimated at more than $158 million. In most cases the culprit was lint. Consumers are warned to make sure you clean the dryer duct hose.