As a bus washer, your responsibilities are to clean both the interior and exterior of buses. Your duties include mopping, sweeping, and vacuuming the floors and seats as needed. A commercial cleaner is used to polish the exterior and make sure the interior is clean. You remove the dust, grease, oil, and other unwanted substances to keep it in prime condition. You also check fluid levels, including fuel and oil. You may also maintain other aspects of the bus and report damage as soon as possible to avoid costly and belated repairs.