Hi tort, and welcome to AF,
When did it get wet?
If a phone gets wet you should immediately remove the battery (if possible - hard power down if not), shake what water you can off it, then stick it in a bag of uncooked rice for a couple of days to draw moisture out. Do not use heat to dry it and absolutely do not turn it on).
Once it's dry, you just have to hope that there is no corrosion damage. That is pretty much all you can do. If moisture is detected (phones usually have moisture indicators inside them) you have no warranty any more.
Sorry I don't have better news. All I can say is that if there's any possibility that there is still moisture in the device try what I suggested above, even if it's very late.
Good luck.