In the cold winter, the temperature is low, the amount of water vapor evaporated in the air is reduced, and a large amount of water vapor condenses into frost, snow and other forms, resulting in a decrease in the humidity in the air. In addition, there are often strong northwest winds in winter, and this wind direction will also accelerate the evaporation and loss of water.
Under normal circumstances, the suitable healthy humidity for the human body is between 40%RH and 60%RH. If the air is too dry, the dust and suspended particles increase, and we inhale too much, which will cause respiratory damage. Especially the elderly and young children have weak body resistance and are susceptible to bacteria and viruses. The dry environment also accelerates the loss of body water, causing skin sensitivity, reduced resistance to bacteria and infection, and causing a series of skin problems. For example, in a dry environment, when we get up every morning, we will feel dry mouth, tight muscles, and low mood. Therefore, many families use air humidifiers to increase the cool mist humidifier of indoor air in winter. The correct use of air humidifiers can not only achieve a good humidification effect, but also purify the air and relieve the symptoms of colds. However, if used improperly, the humidifier may become a bacterial culture dish and even endanger health. So how to use air humidifiers correctly?

1. Control humidity
The most comfortable cool mist humidifier range for the human body is between 40% and 60%. The humidity here generally refers to relative humidity.
When the humidity is lower than 30%, the air will become dry. The throat is prone to phlegm and the nasal cavity is prone to bleeding.
When the humidity is higher than 60%, the air will become humid. The bacterial reproduction rate increases, which can easily lead to upper respiratory tract infections.
When the humidity is higher than 80%, bacteria are easy to breed. This humidity will cause discomfort to the human respiratory system and mucous membranes, and will also make people feel chest tightness.
When the cool mist humidifiers is between 40-60%, the human body will feel more comfortable and will not cause bacterial reproduction. If the indoor humidity is too low, the skin will be dry and the body will lose water faster. If the indoor humidity is too high, the low temperature and high humidity will make people feel colder. Therefore, the normal setting of 50% is the most appropriate.

2. Change water every day and clean regularly
If the cool mist humidifier is not cleaned regularly and is in contact with water for a long time, it will become a place for bacteria to grow. If it spreads into the air, it will invade the respiratory tract and induce pneumonia, even if it is a ultrasonic humidifier with sterilization technology. Therefore, the water should be changed in time every day. It is best to ensure that the filter is cleaned at least once a week and replaced once a year to prevent bacteria from multiplying in the water. If the humidifier is idle, avoid pollution caused by water storage and try to pour out the water in the humidifier and clean it up.

3. Use detergents with caution
Many people add disinfectants when cleaning for cleaning effects. If the disinfectant remains in the water tank, it will also cause our respiratory diseases. The appalling Korean humidifier incident was because the disinfectant used to clean the humidifier eventually became the culprit of lung disease.
In fact, as long as you pay attention to timely flushing and changing water during use, and keep it dry when not in use, the few remaining microorganisms will have no effect on human harm. People themselves live in a natural world with a large number of microorganisms. Excessive use of detergents may cause disinfectants to enter the human body and cause our respiratory diseases.

4. Choose water quality
It is best to use distilled water or purified water. The mineral content in ordinary tap water is relatively high. If these minerals are deposited in the ultrasonic humidifier, they will promote the growth of bacteria; if they evaporate with the water, they may turn into white dust and fall into the house or be inhaled by the human body. It is also not recommended to add aromatherapy, essential oils and other substances to the water to avoid allergic reactions in children or the elderly, causing asthma and other problems.