ramseyclan2 , Use the links below to see how to clean corrosion off of battery contacts. If not really bad, I use an ink eraser on a pen (slightly abrasive) to clean and then blow out dust/debri with canned compressed air. Last link will show how to remove back in case you have to dig a little deeper. Good luck.
I hope this helped you out, if so let me know by pressing the helpful button.
http://cleaning.lovetoknow.com/Clean_Alkaline_Battery_Corrosion
http://www.howtocleanstuff.net/how-to-clean-out-corroded-batteries/
https://www.youtube.com/watch?v=oSWVSX66WZw
[guide|11095]