The frequency of cleaning a car's condenser (also known as an air conditioning evaporator) depends on a variety of factors, including the following: 1. Vehicle environment: If you frequently drive in dusty, polluted areas, the condenser may be more prone to accumulating dust, dirt and impurities and need to be cleaned more frequently. 2. Use habits: If you often open the window instead of using the air conditioner, or activities such as eating in the car are easy to produce garbage and dirt, which may cause the condenser to accumulate more dirt and need to be cleaned more frequently. In general, it is recommended to clean the condenser of the car at least once a year or every two years. This can help maintain its normal operation and heat dissipation effect. If you find that the air conditioning of the car is reduced, the cooling effect is poor, there is an odor, or there is an abnormal noise, it may mean that the condenser needs to be cleaned. In addition, if for some reason (such as finding that the condenser is seriously blocked, etc.) you feel that you need to clean, it is best to ask a professional auto maintenance technician to check and deal with it. Please note that cleaning the condenser may require specialized tools and techniques, as well as specific cleaners. If you are unfamiliar or unsure of how to do the cleaning, consult a professional or car repair service provider. They will be able to give advice and guidance for your specific car model and situation.