Cornstarch. Cornstarch dries up oily patches. Mix 1 to 3 tablespoons cornstarch with enough warm water to make a paste. Rub on your face, let dry, and then shower or rinse off with lukewarm water in the sink. Try this once a day for best results.
Salt. This gift from the sea is nature's best desiccant. Place tepid water into a small spray bottle and add 1 teaspoon salt. Close your eyes, and pretend you're at the seashore. Then squirt some of this salt spray on your face once during the day. Blot dry.