Remove the battery asapasas that may cause short circuiting, secondelysecondly just open up the phone and keep it in dry icerice it absorbs moisture, if uif you can open up the phone more, dodo it and try to blow it in order to remove any condensed salt partuclesparticles as they are conducting and may cause ahorta short circuit. If it still dosent work, well gift her a new phone :p