I’ve had my AirPods since the first shipment, December 2016 and have noticed that the volume seems quite a bit lower. At half volume I can barely detect the audio. In other words, half volume seems to be low. High volume is what I would think of as half volume. I’ve compared output between iPad, iPhone, Watch and Mac and all seem to be about the same. If there is a difference it would be that the iPhone and Mac are slightly lower. Watch and iPad seem slightly higher but at half volume they are also barely detectable. For comparison I plugged in the included, wired EarPods and they are much louder. I clean them fairly regularly in the usual way one would. Maybe there’s stuff that’s gotten behind the grill but the outside is kept clean.
Anyone know of a way to reset it or boost it? They’re still useable but just barely. If the volume goes any lower they’ll become unusable. I should note, they are very well taken care of. Never submersed, kept in case when not in my ears, never dropped. So, no chance of their being damage. This is just some sort of degradation via normal, daily (1-2 hours a day) use.