How do you clean a o2 sensor?

To clean an O2 sensor, you can start by removing it from the vehicle, ensuring the engine is cool. Use a specialized O2 sensor cleaner spray or a mixture of isopropyl alcohol and water to gently clean the sensor's exterior, avoiding any abrasive materials that could damage it. Allow it to dry completely before reinstalling it. However, keep in mind that cleaning may not always restore functionality, and replacement might be necessary if the sensor is faulty.