Brown spots that flick off with an alcohol‑dipped Q‑tip are scale. The sticky residue is honeydew. For light infestations, remove each scale with alcohol Q‑tips. For heavier cases, spray the entire plant (leaf tops, undersides, stems, soil surface) with straight rubbing alcohol twice weekly for three weeks to kill hatching eggs. Dead scale can be wiped off later. Persistence eliminates the colony.
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