Turn the air conditioning on, ensuring that it’s not set to ‘economy’ mode. When you first get into a hot car, open the windows, ensure that the air vents are set to face level and the system is set up to do the same, not pointed at your feet. Remember cold air falls. Turn the temperature to as low as it will go, and the blower as high as possible. Also make sure that the air is on ‘recirc’ mode and not taking air from outside. When the temperature is more comfortable, close the windows and increase the temperature to a more suitable level as well as decreasing the blower speed. You should also point the air vents upwards to ensure the cold air flows down again.