Traditional Culture Encyclopedia - Hotel reservation - How does hotel cleaning ensure that there are no guests in the room?

How does hotel cleaning ensure that there are no guests in the room?

Oh, this is not easy. You can go to the door and listen to see if there is any movement inside. If there is any movement, it means there are guests inside. Another way is to knock on the door. Usually if there is someone inside, the person will say yes, and then you will know if there is anyone inside. Because knocking on the door is not too much.