The short answer
Isolate the plant, remove visible mealybugs, and repeat inspections and treatment. Their white, cotton-like clusters often hide at leaf joints and beneath leaves.
Why this happens
A single cleanup rarely removes all life stages. Newly introduced plants are a common source, and insects may hide under pot rims or in dense foliage.
What to do
- Separate the affected plant from others.
- Remove visible insects gently with a damp swab.
- If needed, use a product labeled for indoor plants and mealybugs, following all directions.
- Inspect weekly and repeat treatment at the label's interval.
Keep in mind
Test a small leaf area first; oils and soaps can injure sensitive plants. Keep treatment products away from pets and children.