Robot vacuum leaves streaks of dust or hair along edges and corners.

Safety first: Turn off the robot before handling brushes.

• Inspect side brush: Ensure the side brush is installed, not missing, and that its bristles are not bent or worn flat.
• Clean hub: Remove the side brush and clear any hair or debris from the hub and shaft.
• Replace if worn: Install a new Samsung‑compatible side brush if the old one is deformed or damaged.
• Test edge cleaning: Run the robot along a wall and observe whether the side brush now sweeps debris into the path of the main brush.