Arrived onsite for dryer vent cleaning. Observed significant lint under, behind, and around the dryer. As a courtesy, cleaned the lint around the dryer using homeowner’s vacuum. Detached dryer vent. Used 450cfm blower to clear out the lint from the venting. Reattached the dryer vent to the dryer. Operated the dryer to inspect for where the lint is coming from. Did not find any source for the lint. Homeowner will monitor.