This residential air-duct service began with an assessment of the open air handler, including the blower, coil area, controls, wiring, and cabinet lining. The flexible return duct showed heavy dark dirt buildup and long-standing discoloration, establishing the primary return-side condition documented during the visit. We cleaned accessible supply branches with micro-whip agitation to loosen settled material beyond the registers. A large hose connected the system to the vacuum truck, creating sustained negative suction that drew dislodged contaminants toward collection and helped contain dust while the technician worked branch by branch. The return opening was also connected to the collection system for return-side cleaning. The later photographs show the collection hose removed and the return opening restored for viewing. Persistent discoloration and some adhered material remain visible on the flexible return liner; these surfaces are documented factually rather than represented as stain-free. The photo sequence shows the condition, component assessment, mechanical agitation, collection method, and the final documented return views without promising measured airflow or health results.