GrumpyTom,is right. I have done gunsmithing and have built x bows from scratch before they were commercial available, of couse all this was before I got my shoulder crushed, It can be very dangerous unless you have been train to understand and work on them. Of course warshing them out with gun scrubber then oiling could be considered normal maintainance. Just do not get out the stones unless you know what you are doing. I would warn all not to get the gunscrubber on synthetic stocks or camo. For those who run into a problem a trained dealer or gunsmith or returned to the factory is best if you do not fit into these catagories your self. Lee