How long ago was the water spilled? Like Mark said, the enclosures don't offer much protection (unless they advertise themselves to be waterproof, etc) against stuff like this.
If the spill happened only in the last few days, don't reconnect it.
Leave the drive in a warm (but not hot) area with very good circulation (or put it in front of a fan (but not an air conditioner, that'll just get it wetter) for a few days to make sure it dries off completely.
Then run any one of the standard drive recovery tools we've recommended ad nauseum elsewhere on this siterecommended ad nauseum elsewhere on this site.
