My left AirPod is much quieter than my right one

Unfortunately, the reset did not work. FYI, the right AirPods works at a very low volume...seems as thought it is not working at all until I remove the left one.

Try a reset:

1 Factory Reset

1. Press and hold the setup button for at least 15 seconds.
2. Hold the button until the status light starts flashing amber a few times and then flashes white.
3. You AirPods have now been fully reset. You will need to re-pair your AirPods to your devices in order to use them again.

If the problem persists, contact apple support or book an appointment with an apple expert and take it there. They will guide you best.

There is a possibility that you need to get your AirPod serviced