Thank you for the feedback. I suppose you tried twisting the tubing side to side as well as pulling straight out? I find that works. Just twist it hard to the right or left and pull and it should come off. Otherwise could you not cut the old tubing tip off? I do not know how often you replace the tubing or if you are leaving it on the compressor from treatment to treatment? It is important to run the compressor with the cup removed from the tubing for 3 minutes after each treatment. That helps to dry it out. Then remove tube from the compressor and hang it in a safe clean place till the next use. Replace the tubing every two weeks with new is recommended by NJH. Throw out or recycle the old tube. Nice that you are a performer. I was a singer growing up and performed. Now my bronchiectasis has affected my voice and I can no longer sing. I have to whistle if I feel the urge!