Wipe down the top and bottom of your peace lily leaves with a damp paper towel to remove dust and residue from the air. Use care to clean each leaf on the plant.
Allow the leaves to dry naturally. In most cases, foliage is returned to its natural state and produces a healthy glow.
Apply commercial leaf shine products following the instructions on the container. Coat only the upper side of the leaves. Coating the underside of the leaves may clog the stoma used for transpiration. Clogged stomas result in death of the plant. Carol Savonen from the Oregon State University Extension recommends testing products on a leaf or two and waiting 24 hours to see if your plant tolerates the product.