This just started this morning. I was camping all weekend, left my 6s in the tent, woke up this morning & the tent was cold & wet, dew, etc. iPhone seem fined but was dead. I tried turning it on and the insert cable screen came up, whatever you want to call it. I plugged it into my car charger on the ride home. I checked the phone 10 minutes later and it wasn't on. I pressed the power button and turned on so I left it alone. I didn't notice until later that the phone was just shutting back off. I figured I would let it die but I cant find a way to do it? Anyways, I got home and used my wall charger. 6s turns on, sits at the Apple screen for 1 minute & then turns off. Any idea what my options are? I have no idea what is going on as it was fine all weekend.