Tenant shall clean and maintain in good order, condition, and repair and replace when necessary the Premises and every part thereof, through regular inspections and servicing, including, but not limited to: (i) all plumbing and sewage facilities (including all sinks, toilets, faucets and drains), and all ducts, pipes, vents or other parts of the HVAC or plumbing system; (ii) all fixtures, interior walls, floors, carpets and ceilings; (iii) all windows, doors, entrances, plate glass, showcases and skylights (including cleaning both interior and exterior surfaces); (iv) all electrical facilities and all equipment (including all lighting fixtures, lamps, bulbs, tubes, fans, vents, exhaust equipment and systems); and (v) any automatic fire extinguisher equipment in the Premises.