Please remember that they very well may NOT be retained stuck caps. The living caps, which are required, can and do become dented, wrinkled, or cracked if the humidity is too low.
Don't mess with them. Just raise the humidity in the enclosure to a steady 60% and when you see the signs of the next shed, belly goes pink, eyes go dull, raise it even higher that week until the snake sheds. Around 70 to 75% to ensure a complete shed.
Add a humid hide if you need to. Then if they are stuck caps, they should come off with no problem.