1. It depends on the situation. If the humidifier can be turned on overnight, pay attention to the degree of dryness in the air. If it is in a drier area or in drier weather, the humidifier can be turned on overnight.
2. But if it is not so dry, it is recommended to open it for about 2-3 hours every night. Generally, the humidity in the air can be kept at about 20%‰-50%. If the humidity is too high, it will cause adverse effects on health.
