My new Nothing Ear earphones had been working great, but after a few weeks I noticed that sometimes they sounded like they were underwater. The audio would be extremely quiet and muffled. No matter how I adjusted any of the EQ settings, noise cancellation, in-ear detection, codec choice, or anything else in the Nothing app, the problem persisted. A full reset of the earphones didn’t help. I reached out to Nothing support and heard crickets to this day and decided I’d give it a week or two more before returning them.