37 Cleaning and disinfection of cleanrooms; Cleaning and disinfection of cleanroom facilities and equipment; Cleaning and disinfection, including in relation to sterile rooms, laboratories, sterilization apparatus, disinfection apparatus and decontamination apparatus; Internal and external cleaning of buildings to reduce the spread of viruses and micro-organisms, specifically in cleanrooms, sterile rooms, and laboratories; Maintenance services relating to cleanrooms; Maintenance services relating to cleanroom facilities and equipment; Maintenance services, including in relation to sterile rooms, laboratories, sterilization apparatus, disinfection apparatus and decontamination apparatus; none of the foregoing services for carpet or upholstery cleaning or use in residential homes