TV reporters checked into a Hyatt, Hilton, and a Trump hotel in New York and left marks on pillows, television remotes, thermostats and other areas of the room with washable sprays and gels that show up under UV light to see whether cleaning procedures are being followed.
They checked back into the same rooms the next day to see whether sheets had been changed and high touch points had been cleaned. Two hotels utterly failed, and one hotel partly failed – enough so that you wouldn’t want to stay there.