Depending on the year/engine of your vehicle, your car will have either a Mass Airflow Sensor (MAF), or a Manifold Absolute Pressure Sensor (MAP). They make a specific aerosol cleaner to clean a Mass Airflow Sensors that is available at any auto parts store. Be very careful when cleaning these sensors and do not use chemicals other than the MAF Cleaner, or you risk damaging the sensing element. Just remove the sensor (Do this with the key off or you’ll set a code) and spray the little thin wire with the cleaner. You shouldn’t need to do any more than that to clean it. Hope this was helpful!