Performance problems in robot vacuums usually involve weak suction, missed areas, poor navigation coverage, or shortened cleaning cycles. In most repairs, these issues trace back to airflow restrictions, worn brushes, dirty sensors, or battery degradation rather than a single failed component. A common pattern we see is gradual decline as debris accumulates and parts wear with daily use. Difficulty is generally low to moderate, and success rates are high when inspected methodically. Always diagnose the underlying cause before replacing parts.