I'm not an expert in electronics, but I am an expert in water. I'm a plumber. I'd have to say that I can't imagine your card is fried. If it was working when you unplugged it then you should be fine. I realize it was acting up, but as long as you had some sort of signal before you unplugged it then that tells me you were possibly on the verge of frying it. Water, however not the best for electronics, isn't actually that great of a conductor.
Why are you looking to put alchohol on it? As a plumber I've use alchohol to help break down some caulk/silicone to clean up jobs. I'm not sure what it would do to your card.
I would also agree w/ the other poster, don't plug it back in untill you are SURE that it's dry. Just because it looks dry, doesn't mean thier isn't condensation somwhere inside something. Also, if you have any kind of moist air anywhere, once you plug it back in and the temps start to go up, the dewpoint is reached which may cause condensation. Just be absolutley positive it's dry.
Just wanted to make sure that all this was taken into consideration. Post the outcome, I'm interested to hear how you make out.
Good luck!