Hello, I got this plant from a friend who wasn't doing so well with it, and I recently that it's not meant to have little black lumps on the stems (I thought they were potential shoots or something).
I think the black lumps are scale, as the surface under the plant is sticky and there are little sticky globules on the plant too. I've attached pictures so you can check
How do I get fix it? Also, it hasn't flowered in ages, is this a symptom or just not the right nutrients in the soil?
Cheers for any help!