Bottom of iPhone screen unresponsive
There are several causes for behavior like this, but in this case, the fix was really simple. My phone has a two-piece Anker protective case in which the front part covers the entirety of the screen, much like a screen protector. Some of the water got between the front of my phone case and the screen and was screwing up the touch screen responsiveness. All I needed to do was remove the phone case, wipe the water off of the front of the screen with my sleeve, and voila! Good as new. This has happened to me before but I forgot about it, so here is the fix for anyone else with this simple problem.