Please choose the correct ending to complete the given sentence: Health: [header] How to keep the nose moist to prevent nosebleeds [title] Use a humidifier. [step] You can use either a cool water humidifier or a vaporizer. When the air is very dry, any increase in humidity will help prevent a nosebleed.

Ending1: Humidifiers tend to dehumidify more easily than a vaporizer, because they have low drying cycles. If you want the environment to become more dry, consider using a mist humidifier. Ending2: A combination humidifier is ideal for cold weather. Dry air can often interrupt the healing process and cause nosebleeds. Ending3: Moistening the air at night will also make it easier to breathe and to sleep. [substeps] If you don't have a commercial humidifier, you can make one by putting a pot of water on the radiator/heating in the winter. Ending4: Put the humidifier on for half an hour or two a day until the nosebleed subsides. [substeps] Make sure that the humidifier is not connected to any heat sources.

Answer format: ending1/ending2/ending3/ending4