Performed air duct cleaning and sanitation. All vents and ductwork are clear of dust and debris at this time. Unit is functioning properly at this time. Recommend duct cleaning every 2-3 years. Performed 2 dryer vent cleanings. Both vents, all ductwork, both flex hoses and both lint traps are all clear of lint and debris at this time. Both dryers are functioning properly at this time. Recommend dryer vent cleaning every 1-2 years.