Did you let yours take a 30 minute bath in a salt pool? 

  I put it in a bag of rice overnight, but it was full of corrosion the next day.  I had to soak it in distilled water overnight, then in isopropyl alcohol for a few hours to pull out the water.  Then buffed off the remaining corrosion from the boards, resoldered two surface mount connections the size of a human hair because the solder all blew out when it shorted, and replace the battery.  It's a miracle it's even alive....