So the slim adjustable is still not operating. Been soaking all day. Any thoughts from the experts?
Keep soaking it and once in a while try turning. It *will* eventually loosen and free up. Be sure to use scrubbing bubbles, too (not the generic knock-off brand) and let it soak for a long time.
Others have had luck with CLR. I haven't used it so I can't say how well it works.
Keep at it. It will free up.