A squirt with some dewatering fluid such as WD40 might help after the event but you will end up with a sticky circuit board.
While I'm always keen to promote WD-40 as a way to help the local San Diego economy, I learned long ago it's a bad choice for complex PCBs, especially those with socketed parts. Over time the connections get poor.
The best and SAFEST way to dispel water from a small electrical device is to put it in a bowl of new, clean, dry white rice. After a day the rice will have absorbed all of the moisture. The same technique "fixes" cell phones dropped into the sink, but won't remove the red mark from the moisture label!