Check the setting of the Hook versus the Needle. The Hook should pass the NNeedle on its outward and inward strokes through the Scarf Area of the Needle. Make sure the Needle Guard is set flush to the back edge of the Needle. It helps to align the Needle or Needle Bar and Needle so that the Scarf of the Needle when viewed from above would run from 8:00 to 2:00 as opposed to dead flat (9:00 to 3:00). The Latch hook itself can be set with a slight downward tilt from rear to front; this gains room between the Latch and the Needle and aids in the Latch Hooks shedding process. The Hook Carrier Guide can be so tight that it is forcing the Hook into the Needle. Loosen the Hook Carrier Guide Screw and tap the Hook Carrier Guide towards the rear of the machine. Warning: too loose and the Hook will not engage the Needle.