Yeah I had the same problem when I first tried them, the way i moved my hand they would work their way out or if i was wiping excess ink off they would also pop out. I can't remember off the top of my head if they can twist both ways I did something different with the way I twisted them in so the way your finger sits is working towards tightening it rather then loosening...mmmm I can't explain it but they working good for me now and stay in good. I can have a better look tomorrow at work and let ya know if no one else chimes in by then