Clean Dusty Houseplant Leaves in 6 Steps: Water Before Detergent
For dusty indoor foliage, identify the plant and start with a soft cloth dampened with plain water. Fuzzy or sensitive leaves need different care.
Iowa State University horticulture advice says plain water is enough for most dust on leaves. Harsh detergents and leaf polish may damage foliage, so start by checking what your plant tolerates.