You can get instructions from the Geneve Watch group web site http://www.genevawatchgroup.com/ click on "customer service" and scroll down the page until you come to Tommy Bahama and down load your instructions.
I haven't, but it isn't unknown for a watch battery to leak and it isn't unknown for the breath of the person changing a battery to create condensation that gets trapped inside. Dust and dirt too can gain access while the back is removed.
Or, it can be just coincidence.
