Car cleaning tip: Duct Clean to Keep that New-Car Smell

Compressed air from a small, portable compressor is an easy way to blow dust and dirt out of heating and air-conditioning ductwork. The trick is to aim the high-pressure air at the walls of the ducts behind the vent grilles, where dust and dirt stick and cause musty smells. If your car has a cabin air filter you can change it, or remove it and blow the dust and dirt out. 

Courtesy of: Popular Mechanics