The camera zooms in on a close-up of the stain on the fabric sofa cushion, revealing a large dark patch. A cleaning tool enters from the right side of the frame and glides across the stain's surface. As the tool moves, the stain gradually disappears along its path, exposing the clean fabric beneath. Visible through a transparent tube directly above the tool, the dirty liquid is sucked away (the waste flows into a non-transparent cylindrical container). The tool's path leaves a sharp, clean line across the cushion surface, creating a dramatic before-and-after contrast through continuous footage. Smooth tracking shot.