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This post was last edited by 2016jiayou on 2016-1-25 at 14:25. Many car owners think they don’t need to wash their cars on rainy days, but this is not the case. Rainwater often contains acidic and sticky substances, and prolonged rainfall can cause severe damage to the vehicle’s surface. If not cleaned in time, the car’s surface is prone to rusting or even corrosion, which loses its luster and affects the vehicle’s appearance. Furthermore, habits such as putting car covers on vehicles in rainy weather or wiping them with wet rags are also misconceptions regarding vehicle maintenance. How should one protect one’s car on rainy days to ensure driving safety? The car rental company offers you 6 suggestions: 1. Clean promptly When it rains heavily, the car should be cleaned as soon as it is returned; otherwise, mud can accumulate in the gaps on the underside of the vehicle. These areas serve as places where moisture can accumulate, and they are also the most prone to rusting. Paint protection: The acidic components in rainwater have a strong corrosive effect on a car’s paint, and over time this can cause damage to the paint. Therefore, during seasons with heavy rainfall, it is advisable to have the car’s paint repaired. The simplest method is waxing, while a more lasting and effective option is applying a sealant. Regardless of the method used, it provides an invisible protective layer for your car, preventing the paint from fading and aging, thus keeping its bright appearance intact. Chassis care: The chassis is the part that is in closest contact with the ground, and it is greatly affected by road conditions. This area is most prone to rusting, and the wheel housings may even become loose or perforated. Therefore, it is essential to pay attention to the cleaning and rust prevention of the car’s chassis; by carrying out a rust prevention treatment on the chassis, its protective effect can last for 3 months. After applying the rust prevention treatment, be careful not to wash the vehicle’s body and chassis with alkaline cleaning agents, as this will undermine the rust prevention effect and shorten its duration. Ignition start: On rainy days, car owners often encounter the problem of difficulty starting the engine; sometimes, even if it manages to start, its performance is weak. The most likely cause of this problem is a leakage in the ignition system due to moisture. Furthermore, it might be that as the weather turns cooler when it rains, the hot air trapped inside the distribution panel can condense into water droplets, causing a minor flood inside the panel and thus preventing it from functioning properly for ignition. Once it is found that poor ignition and reduced engine performance are caused by moisture in the ignition system, it is best to first dry the inside and outside of the distributor as well as the wires using dry paper towels or cloth. Then, use a specialized desiccant spray can to apply the desiccant to the distributor cover, battery terminals, spark plugs, high-voltage wires, and ignition coil. After waiting for a while, the engine can be started. Braking and water removal: The braking systems in most cars are of the dual-pipe vacuum-assisted hydraulic type. It is important to note that the brake fluid used to transmit braking force has a high degree of water absorption. If water enters the brake fluid, the high temperature generated by friction during braking will cause the water to vaporize. Gases are compressible, and when compressed in brake fluid, it can lead to braking failure or even complete loss of braking function. When there is heavy rainfall, the humidity in the air increases. If the brake fluid already contains a small amount of water before the rainy season arrives, it can be very dangerous. In some vehicles whose brake fluid absorbs water quite heavily, water droplets can be seen on the cap of the brake fluid reservoir. Therefore, the brake fluid must be checked during maintenance to ensure the safety of drivers and passengers. Use the air conditioner regularly. When it comes to preventing moisture buildup indoors, using the air conditioner is the best method. Even when the weather is cool, setting the appropriate temperature and turning on the air conditioner will not reduce the effectiveness of the heating system; instead, it can enhance the dehumidification function. Once the weather clears, park the car in the sun to let it be exposed to the sunlight; open all four doors to allow air circulation inside. The heated car body will quickly release any moisture that has accumulated inside. When the car isn’t in use, desiccants are a great alternative to the air conditioner for removing moisture; air fresheners also have many advantages – they save electricity as well, and two batteries are enough to keep them working for a long time. With these two items, there’s no need to worry about humid and dirty air hitting you as soon as you open the car door. Wuhu car rental companies remind all drivers to pay close attention to maintaining their cars in rainy weather. The above 6 tips can provide temporary relief in rainy weather, but it’s still necessary to have your car properly repaired or its paint fixed when the opportunity arises.