The first hotel they tested was Candlewood Suites in Manhattan, New York.

As in the previous demonstration of the fluorescent spray, the investigators sprayed the sheets in a room and came back the next day under a different name.

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When they lifted the sheets the next day, they made a horrifying discovery...

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Lo and behold, the "I slept here" text was still on the sheets!

Clearly, the hotel didn't change the sheets for the next guest. What?!

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After seeing this, they got a hold of the hotel manager...