Dryer vent cleaning, attic discharge. Customer recently purchased a newer front load style washer and dryer set and the dryer was coding for an obstructed exhaust vent. Inspected vent in attic and cleaned and removed 3 lbs of wet lint buildup at rooftop discharge by hand. Went below and cleaned out exhaust vent thoroughly with spinning brush and vacuum with 5 passes. Cleaned surrounding area, and reattached dryer. Tested and verified proper function.