1. Make sure the jerky is clean of all connective tissue (Tendons, Grey skin, etc).
2. Make sure it is long enough to feed through while still holding onto the top. Dont' just through hunks of meat down the tube, so to speak.
3.
MOST IMPORTANT Make sure your rakers are palced correctly. If your rakers are not in correctly or not in at all it will just circulate the meat and make hamburger of it.
I have done approx 50 lbs of jerky so far and have had very few problems. The problems I have had are due to the above. One day I was in a hurry and left the rakers out and it was a nightmare until I figured out I was a moron.

Hope this helps
Johnny