Well I did forget to mention that I've been using it for a couple weeks with it like this. I dropped it in the urinal at a concert.
How many weeks was the phone in the urinal
Did you miss the part where OP stated this was at a concert? Typically all sanitation devices get plugged within half an hour of the venue opening, and they stay that way till the next day...What I do not understand that generally there is very little water in a urinal until it is flushed...
Here in Florida, the attic provides 134 F to 145 F and a slow migration of air toward the peak of the roof on a summer day. Free dessication!and baked it in the oven for half a day using gentle heat (150°F, 65°C).