Performed 2nd floor dryer vent cleaning from the inside using the brushes and nikro vacuum. Dryer vent , duct, flex hose and lint trap are all clear of lint and debris at this time. Dryer is functioning properly nd exhaust flow is optimal. Recommend dryer vent cleaning every 1-2 years. Customer was worried that the dryer wasn’t producing lint but I see no issues with the dryer or ventilation.