We Start Where the Janitors Stop. DFS Green does for your carpeting, fabrics, restroom tile, and hard surface what traditional janitorial companies cannot. We do not replace your janitorial company. Rather, we are specialists who focus only on carpet maintenance, tile and grout restoration, upholstery and workstation cleaning, and natural stone care. We seriously improve appearance and IAQ while extending asset life-cycles well beyond what the janitorial model can deliver. For over 50 years, DFS has been a leading national provider of services that utilize both proprietary and industry-leading processes which combine to deliver healthy, attractive, and sustainable workplaces.