Kenney it can be so many different things , you can try cleaning the jaws up with a small file . Check the groves to see if they need to be gently filed to correct the groved places , and also try not to force your material when sawing . The blade needs to do the cutting , also some oil may have been put on the blade holder , over all good cleaning for the jaws . And if its not square to the table it could be causeing some problem too , to much tension can also cause you some problems too .I wore the jaws out on a Craftman scroll-saw and replaced it with a Dewalt 788 several years ago > more of a production saw . And I'm sure their are some other great mines on here to maybe be of some help too .....P.S. hopefully your jaws are not bad . ............Marshall