It could be that it hasn`t dried out properly; two egg cups full of water is quite a lot inside any PC.
I should remove the battery and all other access panels and leave it with the lid/screen open for some considerable period in a warm, dry area. It may be an idea to turn it from end to end (like an open book standing on its spine) to try and ensure full circulation.
Better still, if you know someone with any technical competence in computers, get them to open the case to vent it. Obviously this may negate any warranty, but so does filling it with water.
There is also the risk that some permanent damage may have occurred when it was powered up; this should become apparent if the problem persists when you are certain it is dry.