Same. Started with one ear. I got the screeching to stop by resetting but then it had a constant static - but only in transparency and noise cancelling mode. I called. Told them my guess was from sweat. I was told emphatically no, they are designed for the gym. I took them in. They replaced just the bad one at no cost. But, just yesterday, the other is screeching so I’ll need to go in again. FYI - They were nice at the store and had heard of similar issues. They had me reset, which didn’t work. Then replaced one without even listening for themselves. You have to wait 30 minutes in store for the new AirPods to sync while charging, which was annoying. And wow, that screeching is so loud it could damage ears. Worried this could become a big issue for Apple.