Bathroom Outlet Works

I just discovered that the bathroom outlet works.  That makes three, but I need to get an outdoor spring loaded door for it because it's right behind the toilet.  And I found the lens cap for the outside light.  I'll probably have to change its socket since it's been exposed and corroding for years?  But the screws are still in it.  I've got it soaking in the kitchen sink because it's got some kind of substance on it.