Phone got wet and my husband turned it on

We are not it trying to take if apart ourselves i wanna make that clear before i begin. A few hours ago my husband who owns the galaxy note 4 accidentally dropped his phone. Mid way to the fall he went to catch it and it slipped again he used his foot to stop the fall and with horrible luck it bouces off and landed in the dogs water dish. Now the water dish was pretty much empty maybe a cm of water in it at the time. He turned the phone off right away took it outside to his blowgun n lightly blew it off, no water came out. It seemed fine. Against my warning and pleads to put it in rice for at least a day, he turned the phone on. It worked fine for about an hour and then the screen went black. He turned it off we put it in rice for about 2 hours, hes impatient, and tried turnin it on. When he did touch screen worked but the screen still stayed black. He will be leavin it in the rice for the next day. However, can anyone give me an idea of what might be wrong