Since 1947, Master Klean Janitorial has provided specialized services to maintain a more comfortable environment. Its tenant services include microwave oven cleaning, refrigerator cleaning, daytime maid service, deskside recycling collection and computer room cleaning. Its other specialized services include: final construction cleaning; interior and exterior window cleaning; concrete floor surface sealing; data center cleaning, including stilts and stringers; and upholstery cleaning, to name a few. Master Klean is Colorado based corporation with more than 900 employees who clean 12,000,000 square feet of office space five days a week. It is also the designer of the MK2000 System, which is a unique, totally integrated cleaning method that consistently produces distinctive results. Master Klean Janitorial maintains offices in Denver.