iphone 6S randomly entering letters and numbers
i have an iphone 6S updated to 12.1.2. It began last eve. The phone entered arbitrary numbers and letters and i received the phone is locked...try again in 1 min., 3 min, 15 min, etc. opening the calculator app, readdle app, all random and without my input. I took the phone out of the case and there were a few droplets of water on the inside back of the case. I was working in a cold garage with the phone in my pocket then outside in the snow.
What do I need to do to get this to work properly again?
thanks
bj
iPhone 6s