As a former building service contractor whose company has cleaned all types of industrial locations for years, I can verify that industrial facilities can be a cleaning disaster just about every day. Whereas an office building, for instance, may stay relatively clean through the course of the day, this is rarely true of industrial locations.
For one reason, industrial locations are often operating 24/7. Further, these are fast-paced facilities, with people, products, materials, and deliveries arriving throughout the day. This causes dust and debris to build up. Additionally, workers in industrial locations often work with grease, oil, and solvents – along with potentially hazardous chemicals – during their shifts. These all generate considerable amounts of soil, which invariably find their way onto the floors, walls, counters of work areas as well as the fixtures, showers, and other surfaces in industrial restrooms.