Dust will fall onto any surface and indoor plants are no exception. Once a year I like to do a thorough job of cleaning off the plants leaves. If you have a large sink in an area that can get messy, you can spray water gently over the plant to clean it.
I don’t have an area like that so the method I use is with a sponge in each hand and a bucket of clean water. With wet sponges in each hand, gently glide them over the top and bottom of every leaf. Rinse sponges frequently. This job goes pretty fast using both hands. When finished, spray leaves with an Insecticidal Soap if you suspect mites or aphids. The plants are refreshed and will be able to photosynthesize better now.
