The inferred reasons for this situation are:

1, the quality of sea cucumber is not good, the freshness of sea cucumber during processing in dry sea cucumber is problematic, or the temperature during processing is not well mastered;

2, the problem of hair system, you cook for too long, or soak for too long will lead to the thorn of sea cucumber becoming inconspicuous, and even have a sense of transparency.

If you still feel uncomfortable, you can take a picture and I can take a look at it for you. I hope it helps you.