No matter what I do with this cactus it's not happy. I've had it since it was in a 4" pot so I'm attached. It started really drooping badly a week or so ago. Planta and AI suggested root rot. So I just repotted it to check the roots. Not many but the ones there were fine. I gave it new soil (cactus mix) and moved it from a grow light to a southwestern window. I've only watered it when the soil is completely dry, but it's sort of mushy. I'm clueless. Anyone have any ideas? Thanks!!

