The cold tail warms the head, and during the transition from winter to spring, the temperature difference between indoor and outdoor is large. When warm moisture is blown into the room, it is easy to condense into small water droplets and even form a flowing water layer, which is called "rejuvenation" and "returning to the south sky". There are many moisture-proof methods for returning to Nantian. When the damp "returning to the south sky" strikes, be sure to close the windows, especially those facing south and southeast, so as not to give any chance for the moisture eyeing outside the window to sneak in. The most important period of moistureproof is in the morning and evening of every day. The air humidity in these two periods is higher than that at noon. If the doors and windows are not closed in time, water vapor will seriously penetrate into every corner. In addition, if you feel that the doors and windows are closed and the indoor air cannot circulate, it is recommended to open the window for a short time at noon. If you want to protect the small objects in the drawer from moisture, you can use desiccant. If the clothes in the closet are moisture-proof, you can put soap, tea or desiccant. If antique collectibles, cameras, photographic equipment, musical instruments, electronic components, etc. are moisture-proof, moistureproof box can be used. There are also desiccants and dehumidifiers such as lime and activated carbon, which can remove moisture and prevent moisture. Influence of air humidity in South China on human comfort and health: 1. The "standard effective temperature index" of humidity and comfort is based on skin sensation, physiological response and thermal effect. It shows that the relative humidity is in the range of 20%~50% and the dry bulb temperature is in the range of 23~25℃, which is the best temperature and humidity environment for human comfort. 2. Humidity and health Improper humidity can easily make people sick and affect human health. Many pathogenic bacteria have a long life in an excessively dry or humid environment, and a longer life in a high humidity environment. Studies show that when the relative humidity is 35%~50%, the survival time of bacteria is reduced, and the dermatosis caused by drying is also relatively reduced. Warm suggestion: Wet and cold environment can easily cause moisture to invade the body. Therefore, people who are sensitive to moisture should be careful not to wear wet clothes; Don't sleep on the wet floor, try to choose a bed higher from the ground; Don't be exposed to damp environment for a long time. There are many ways to prevent moisture. The key is to see what needs to be prevented from moisture. I hope I can help you and wish you an early solution to the problem.