I have had this Hoya since I received a cutting some 16 years ago. It thrives on neglect, which, thankfully I am well equipped to provide.
The dirt is spent, but currently I have been too occupied to change the dirt so the dirt rejects water like a champ, thus dripping into the floor.
Meanwhile, I have inserted the top of a water bottle into the dirt and am using it to direct my watering efforts to the center of the pot
Dirt does not absorb enough water, so I guess next step is re-dirting the plant. Possibly a pot with no drainage.