With kings you can probably rub them a bit yourself, after you go through the whole soaking thing, with a wet paper towel. I also can usually grab the bit of skin sticking up around the eye with my fingers. But you have to be VERY gentle, and if it really is mutiple sheds it might not work. If it doesn't give right away, don't force it, or you might damage the eye.
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"The serpent crams itself with animal life that is often warm and vibrant, to prolong an existence in which we detect no joy and no emotion. It reveals the depth to which evolution can sink when it takes the downward path and strips animals to the irreducible minimum able to perpetuate a predatory life in its naked horror."
Alexander Skutch