Isolate the infested plant
Prune heavily infested stems and leaves
Wipe visible scale off with a cotton swab dipped in rubbing alcohol
Spray the plant with insecticidal soap or horticultural oil
Repeat treatment every 7 to 14 days until gone
Check leaf undersides, stems, and joints for hidden scale
Remove and discard severely infested plant parts
Wash the plant with a strong stream of water
Treat nearby plants if infestation has spread
Monitor the plant regularly for new scale
Use neem oil if appropriate for the plant
Apply a systemic insecticide only if needed and label allows it
Clean pots, tools, and nearby surfaces after treatment