I have tried reviving no less that 20 of the 18650s,,, no luck on any of them. I don't think the chemistry allows them to be revived.
From all my training and reading, once they go dead, they can actually go reverse polarity (I currently have 2 that show reversed voltage ,so they are both sitting in a tin bucket of play sand).
If you find a way that is repeatable, let me know too.
Best of luck
Bruce