What Causes Dampness Inside the Car on Rainy Days?

[CalebAnn]

It is generally due to water leakage inside the car, which often occurs at the door or trunk openings. The main causes are deteriorated, aged, or broken rubber waterproof seals, which can be replaced. Below are some dehumidification methods for a damp car interior: 1. Turn on the AC for dehumidification: When the air inside the car is humid, turn on the AC cold air. The car AC can regulate cabin temperature, similar to cooling the car before driving in summer. This not only quickly circulates air but also rapidly removes moisture. 2. Give the car a 'sunbath': Sunlight contains ultraviolet, infrared, and visible light. Like humans, cars also benefit from sunbathing, especially during damp and rainy seasons. The heated car body quickly expels accumulated moisture. 3. Frequently replace interior items: Carpets, seat covers, and other cotton/linen materials in the car are prone to dampness, mold, and bacteria growth. Therefore, it's best to air-dry or regularly replace these items.