After the air cooler has been used for a period of time, the accumulated dust and internal water curtain and water tank should be cleaned regularly. During the change of seasons (summer), it should be cleaned thoroughly before use. Leaving standing water for a long time can cause bacteria to multiply and produce odor. In addition, regular inspection of the air cooler can greatly extend the service life of the air cooler. If properly maintained, it can be used normally for ten years.