The moisture alert protects the USB port from shorting. Sometimes it's right (rain, sweat, shower steam); sometimes the sensor just needs a reset. Never bypass it while actually wet.
- 1Unplug immediately; shake the port downward gently.
- 2Let the port air-dry 30 min - 2 h; a fan accelerates it. No hot hair dryers.
- 3Restart the phone, clears a stuck warning after real drying.
- 4Clean the port of lint/debris with a wooden pick (dirt triggers false alerts).
- 5If it persists days while bone-dry: clear USB settings cache (Settings → Apps → show system → USBSettings/USB → clear cache) and reboot.
- 6Urgent charge while waiting? Wireless charging bypasses the port safely.
Tip: A warning that returns every time you plug in, dry, clean, restarted, can mean port corrosion starting; have it inspected before it worsens.