Overview

• Set heater and fan to maximum, direct airflow to the windshield, switch off recirculation, and use the air conditioner to dry the air when conditions allow.
• ADAC notes that automotive AC systems typically stop dehumidifying at about 5°C outside temperature.
• ACE advises cleaning interior glass regularly or applying anti‑fog products because clean panes are less prone to condensation.
• Limit moisture entry by removing snow and rain from clothing and shoes, storing wet items in the trunk, and drying mats, with rubber mats recommended for autumn and winter.
• Lower residual humidity with reusable dehumidifier cushions that can be reactivated by drying, or with simple absorbers such as cat litter in a sock, newspaper, or salt, and keep seals and drainage channels clear.