Can you help me fix my SB-600?

So I made the mistake of leaving batteries in my SB-600 for quite some time and one of them leaked.  My flash is now dead.  I've tried cleaning it off with a Q-tip dipped in a little vinegar and that didn't help.

Is there any way to fix the flash?  Should I send it in to Nikon to see if they can fix it?

Any suggestions would be greatly appreciated.