It probably doesn't matter now that it sounds like you've turned it on since it happened, but the best thing to do with any wet electrical item is to leave it long after it looks dry to ensure it dries out completely. It's not so much the water that causes the main damage as the shorting caused by it when you apply power and it's still wet somewhere. Personally I would have put it in the airing cupboard or something and not touched it until at least tomorrow.