Start with getting a few cotton swabs and apply some rubbing alcohol to each one you intend to use. Make sure not to soak them. Gently clean the black speaker screens with the cotton swabs. This will help clean some of the gunk and also loosen the dirt stuck to the inner body. Now get a toothpick and gently scrape off the dirt on the ear ports of both Airpods as well as from the surrounding body. Also clean the microphone port at the side of the Airpods. Then take a microfiber cloth and apply some rubbing alcohol to it. Gently wipe your Airpods with the cloth. Wait a couple of minutes for the Airpods to dry before putting them back into the case. For AirPods Pro, take off the silicone cover and wash them separately and properly dry them before reassembly.