I don't know, that sounds odd,I was using the lee paste and it worked well but had to be applied to every case just before sizing and made a mess of the die. I just lay the cases down on a paper towel with the open end facing me, spray them including inside the neck, wait for it to dry, roll them a half turn and repeat, no mess and much less effort is required than with the lee or rcbs stuff. Maybe you didn't get any in the neck and they got stuck on the expander ball? I also polish my balls (expander balls, ha ha I made a funny) with 1000 grit paper to make things go easier.