For fogging on side windows during rainy weather, you can use toothpaste, water repellent, or the car's air conditioning to defog. Below are specific solutions to address the fogging issue: On rainy days, evenly apply toothpaste or soap to the side windows of the car. Wait for a while until the applied soap hardens, then wipe it clean with a towel. This process will form a wax layer on the glass surface, which has excellent water-repellent properties, effectively preventing the side mirrors from fogging up or becoming blurred due to water droplets. Purchase a specialized water repellent and evenly spray or apply it to the side mirrors. A protective film will form on the mirror surface, which also has good hydrophobic properties, effectively preventing the mirrors from fogging up or collecting water droplets, ensuring clear visibility. Turn on the car's air conditioning to cold air and adjust the vents to direct airflow toward the front windshield to quickly clear fogging on the glass. For a more thorough solution, you can turn on the air conditioning to hot air before starting the car and direct it at the front windshield for about three minutes. This can fundamentally prevent glass fogging. Additionally, using the air conditioning in cooling mode can dehumidify and achieve the fastest defogging effect. The driver can switch the air conditioning to cooling mode and adjust the airflow to the windshield setting. The fog should disappear in about ten seconds.
