If you use ‘pure’ mode, it turns down the climate control making it less effective at keeping the windscreen clear. For local driving, I use an ‘individual’ mode based on the pure mode but with the climate control set to normal. The climate control is never moved from auto and 20°, with the fan at low. Occasionally we need to press the heated screen button to clear slight misting, which it does very quickly, and occasionally I’ve turned the fan up one step just for airflow.
If your car is steaming up Farid, I’d look for another cause. Do you keep the Aircon on all the time?