Why does the back passenger windows steam up all the time in your astra?

The back passenger Windows in your Astra may steam up frequently due to a combination of factors, including poor ventilation and high humidity levels inside the vehicle. If the air conditioning system is not effectively dehumidifying the air, moisture from passengers or wet clothing can accumulate. Additionally, if the vehicle's cabin filter is dirty or clogged, it may restrict airflow and exacerbate the issue. Regularly using the defrost setting and ensuring proper ventilation can help reduce condensation.