Please choose the correct ending to complete the given sentence: Health: [header] How to use a bed fan to help stop night sweats [title] Learn the basics of cooling a room. [step] Heat rises and, as a result, the coolest air hovers around the floor. Pushing up this cooler air can cool you down and minimize or prevent night sweats.

Ending1: [substeps] Place any cool padding on the floor beneath you. Cover anything you can't touch with an elastic sheet. Ending2: [substeps] If you are under 70, ambient temperature should be sufficient for both room and fan. Generally, try 52 to 40 degrees fahrenheit (16 to 32 degrees celsius). Ending3: The most important thing to understand is how rapidly the room's temperature rises and fall at the same rate (or at a certain speed). [substeps] Cool the room down by lowering the temperature slightly to an even level. Ending4: [substeps] A room in which air cannot circulate properly can also get hot. A small space obstructed with large objects may not be as a cool as a larger space or one that contains less clutter.

Answer format: ending1/ending2/ending3/ending4