If you pull the side or chain teeth can not be closed, generally is to apply some wax also has no effect, there is a way you can try, is to pull the head up and down the mouth of the near chain teeth with pliers to bite a little smaller, can not be changed pull the head cluck. Generally this kind of thing is the reason why the pull head is too loose. That is often said to burst the chain. I see you just buy more than ten days, it should not be the problem of chain teeth.