Clean your sink every day to prevent a buildup of soap scum, grease and dirt. Use a wet sponge with liquid dishwashing. Scrub the sink’s surface using a soft non-abrasive cloth or sponge. Wipe the sink dry with a dish towel or other soft cloth to eliminate water stains. For deep clean cover the sink with paper or cloth towels and pour undiluted bleach. Be sure the area is well ventilated and let the bleach-saturated towels sit for 15 to 30 minutes. Rinse thoroughly with water and wipe dry with a dish towel or other soft cloth.