Sticky honeydew on leaves and tiny white shed skins indicate a heavy aphid infestation. Winged adults dispersing to windowsills confirm the population has exploded.
Aphids have soft bodies; soap suffocates them effectively without harsh residues.

Schefflera Scale Infestation: Honeydew, Sticky Spots, and Natural Control
Schefflera "Cottage Cheese" Growth: Need Photo for ID
Overwintering Schefflera Plants in Cold Climates
Reviving a Lopsided Schefflera (Likely Dracaena)
Curly Leaves on Outdoor Dwarf Schefflera in Florida
Troubleshooting Bougainvillea: No Flowers and Leaf‑Eating Pests
Aphid Control on Houseplants: Identification, Damage, and Treatment Options
Reviving a Declining Schefflera: Light, Water, Humidity, and Mite Control
Schefflera Root Rot: Diagnosis and Treatment Options
Controlling Aphids on a Long-Time Umbrella Plant
Tiny White Bugs on a Plant Near an Aquarium: Springtails, Not Aphids
Systemic Insecticides and Bees: Safer Aphid Control for Flowering Plants
35-Year-Old Schefflera Lost Leaves: Likely Dead, Consider Replacement
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