Hi and welcome to the forum.
If it was ‘clean’ water drying can be sufficient but it can take more than a day in a cool to warm flow of air. Do not be tempted to try the phone soon 
You can also dismantle the bottom and top module without warranty concern as that is void anyway.
It will be usefull if you can have the battery tested as it could have discharged by shorting. You will require around of 3.5V just to get it started but better ensure you have around 3.9V. Maybe a friend has an FP3 where you can check the battery,