Mold on mini Phal

[Skycat]

The same mini Phal I've been talking about, that's dehydrated due to being almost rootless and has been pushing out new growth.



That fuzzy gray bit there, between those two new roots.

I've had a tricky time with this one because it doesn't seem like it's getting enough moisture to rehydrate the leaves, but the plant is still alive, at least as far as I can tell. I guess I've overdone it a bit on the moisture?

I rinsed it off and now there's a tiny white patch where the mold was.

The bottom part has been black like that since I got the plant, but I was afraid to do anything to it because it still had some roots on it at the time. Should I cut it now?