Move the plant to a bathtub or large utility sink.
Wet a soft kitchen sponge with cool water, and lather it with 1 tbsp. mild dish detergent. A mild detergent will not contain dyes or perfumes.
Wipe the schefflera plant with the soapy sponge, lifting the leaves and cleaning the undersides as well.
Continue to clean the plant until all the leaves and stems are free of insects, dust, and other debris.
Dampen a second soft kitchen sponge with cool water.
Wipe the plant with the damp sponge to remove soap residue.
Allow the plant to dry in the sink or bathtub before you move it back to its original spot.