You can make a face wash at home for oily skin. Make a strong infusion of lemongrass, using a couple handfuls of the herb to a quart of water. Bring it to a slow simmer, cover, and remove from heat. Allow to cool, then strain and add to an equal amount of liquid castile soap. Use it daily as your face wash.
Lemongrass firms, cleanses and refines sluggish and dull skin and is often used in combination with other citrus oils in body toning lotions and for fluid retention in the skin.