Please choose the correct ending to complete the given sentence: Health: [header] How to stop getting so hot while sleeping [title] Use air conditioning. [step] The simplest way to keep your room cool while you sleep is to use your air conditioner if you have one. Central air or a portable window unit will both do the trick.

Ending1: [substeps] If you can, always take a shower outside, even if the house is cool. Believe me, taking a shower every hour can help to prevent a body heat rash from occurring. Ending2: You'll get more interesting and sleepy knowing the temperature is actually cooler in your room. The cause of this is that it sucks hot sweat out of your body. Ending3: In a cooler climate, it will provide air without causing your lips to swell or becoming chapped. [substeps] This method also works well if your room is, as condensation is less likely to build up on your sheets. Ending4: The ideal sleeping temperature for most people is between 60 and 70 ° f (16 and 21 ° c). [substeps] If you have a programmable thermostat, don't forget to set it so that it automatically adjusts to a warmer temperature just before you wake up in the morning.

Answer format: ending1/ending2/ending3/ending4