What are the steps required to reclaim storage back to the pool on a VMAX 40K running Enginuity 5876.286.194?

I can remove and unmap the dev, dissolve and delete, but I don't see any changes to the pool free column. Am I suppose to just remove the dev from the Storage Group(s) and drain the dev? I looked into the symconfigure using the "free tdev" or "start reclaim", but it seems those options just reclaims unwritten storage rather than reclaiming the whole dev back to the pool. Any help would greatly be appreciated.

Thanks