Older cars can experience challenges with the air conditioning system smelling less then fresh. A musty stale air conditioning system is not pleasant for the driver or passengers. Air Con Cleaner is a simple self running aerosol that is placed in the foot well and recirculate through the system. It leaves a crisp fresh air con system and interior. Directions for Use - 1. Aerosol should be at room temperature before use. Ensure all windows and doors are closed and start the engine. 2. Switch on the air conditioning system, set to low temperature, intermediate blower speed and internal circulation. Ensure face level fascia vents are open. Run engine for 5-10 minutes. 3. Shake the aerosol can well. Fold in the perforated panels of the carton and place the aerosol can at a 40 degree angle. Avoid pointing the aerosol at the carpet. Position the carton far forward in the passenger side footwell and leave the aerosol facing into the footwell. Depress trigger into the lock-down position. Exit vehicle and close doors. 4. Once the can is fully discharged, allow the system to run for a further 5 minutes then switch off the engine and open all doors/windows fully to ventilate the vehicle. Leave doors/windows open and allow the vehicle to air for 5-10 minutes.