This has happened to me. There are a lot of ways to help it. You might need to twirl it around a bit. Try a different outlet it even try and buy a new charger. Next you probably tugged way too hard on your IPod so you might need to go to the apple store and get it repaired its only a little bit less then 50 dollars so it's affordable. If none of these work you might need a new one, this happened to my friend.