Which hotels don't wash sheets?

The unspoken rule of the industry: "We never change the quilt on the bed because it takes too long to clean and dry.

Recently, the well-known American TV program "Inside News" broadcast an "undercover experiment" program, and the staff selected nine high-end hotels in new york for one night. Before I checked out the next day, I wrote "I slept here" on the sheets with special fluorescent agent and drew "Inside News" LOGO on the pillow. These words are invisible to the naked eye, but they are easy to clean and display under ultraviolet light.

The next day, these staff members exchanged rooms in their respective experimental hotels in order not to attract the attention of the hotels. During the test, the experimenter took out an ultraviolet lamp to illuminate the sheets. If this information disappears, it means that the sheets have been changed, otherwise, it means that the sheets have not been changed at all.

The final experimental results are shocking. Of the 9 high-end hotels, 3 did not change or clean the bedding used by the previous guests before the new guests checked in. The experimenter sprayed this invisible special fluorescent agent on the back of the sheets of the Marriott Hotel Residence Inn in Manhattan, leaving a sign "I sleep here".

Then the experimenter left, making the room look as if he had slept. When the group members stayed in the same room again, they found that these "invisible messages" still existed on the sheets.