For those of you following the plight of my 40 year old Hoya plant, Jose, here is an update! He's been hanging tough. My husband took off a lot of dead and dying foliage. His current foliage looks sad but is turgid and alive. Today I decided to take him down and while his foliage is so sparse, lift him out and see what else i could do. I removed as much of the dead impacted roots as I could, and in so doing saw root GROWTH since the last lift! I think we may have been underwatering because the impacted dead roots told the meter he was WET when in reality under there he was not. I repotted with new fresh soil and watered him, returning him to his window. I pray the obvious root growth continues and he does not get too upset with the handling.
So lets hope the last ditch plant root surgery helps and he recovers. The new root growth under there gave me hope!