Try this: after the iso bath, put the whole thing except for the battery and the bottom screw into uncooked rice. it should be upside down, completely submerged into the rice. LEAVE IT THERE FOR AT LEAST A WEEK!. Then, put a new batt and try it. Some condensation in the display could remain, but the rice will soak up every bit of liquid there is.
Believe me, I've saved a lot of dunked things including several phones and iPods.
Believe me, I've saved a lot of dunked things including several phones and iPods.