I tried wiping cache too. Didn't work. I also started it up in Safe mode to see if any apps were causing an issue. Still have the moisture alert. My phone has never been exposed to water. I don't think humidity would be an issue, since I've used the phone during a heavy rainstorm under shelter several times and no issues. I think it may be a hardware/firmware problem. My device is less than a year old. This happened a few days before the last software update. After the update the moisture alert went away. Then yesterday the alert reappeared.
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