I'm really curious as to how this indicator works. If this has been asked before, my apologies, please direct me to the thread where this has been asked. My iPhone has a crack at the earphone jack (I have no idea how that crack got there because I have (a) never dropped my iPhone and (b) it is in a shockproof casing 24/7, even when charging), so I took it to the repair centre today, hoping to get it changed as it was still under warranty. The staff there informed me that as the "wet" indicator had been triggered, I could not change my phone for free, and my warranty was in fact largely useless. I was stumped as to how the indicator could have been triggered. I have at best gotten a few drops of water on the screen (which has a screen protector), and have never used the phone in the rain. The staff informed me, further, that water has to get inside the phone to trigger this indicator. I do, however, live in a tropical country that's practically sitting on the equator, so the weather here's very humid. Could the high humidity have triggered the iPhone's "wet" indicator?