I find with Bernat, and Lily, the inside end is well hidden and I often just get an interior loop and pull. This usually pulls a ball of yarn from the middle and you may have several yards to untangle, but the end is in that tangle. It does get easier with practice.
Red Heart has the outer and inner ends marked on the label.
<-- Outside end tucked in center. VS. Grasp Inner end and pull. -->
I usually stick one finger in each end of the skein and work them around trying to feel the wrap of the skein and smooth out the inside into a tube again. Sometimes I actually manage to find the end but most of the time I get a yard or so pulled out before the end appears.
Good luck fishing. :shrug: [/COLOR]