Perform general custodial services (e.g., empty waste baskets, dump trash, and replace trash bags/receptacles; clean furniture; clean floors by sweeping, vacuuming, and mopping; strip, wax and buff floors; clean carpets and windows; change light bulbs as needed or upon request; clean restrooms; replace paper towels and tissues as necessary and maintain adequate supply of each, etc.). Clean interior walls by removing the adhesive tape, thumb tacks, paper pins, staples, and similar items, and washing and scrubbing (if necessary) the walls with prescribed wall cleaners to remove stains and graffiti.