Photos show fibrous lint at the roof termination and dense buildup inside the detached foil transition hose. The technician opened the accessible exhaust path, disconnected the transition hose for inspection and cleaning, and removed compacted lint from the route. A later view shows less visible buildup along the exposed hose ridges. Removed lint is documented, but the roof termination after service and the reconnected dryer are not pictured, so the final system condition is not shown.