Granite is the perfect choice in sinks when looking for durable and easy-to-maintain beauty. This natural stone is resistant to heat, chipping, fading and staining. Composite black sinks are comprised of highly compressed granite particles. The price generally runs high for these sinks due to their long-wearing nature, so correct cleaning methods are an important part of protecting your investment. Using abrasive cleaners and scratchers is a no-no. Wearing away the top protective layer will leave a rough surface. Mild detergent and water will complete this 15-minute clean.
Add three or four drops of mild dishwashing detergent to a microfiber cloth. Spray lightly with water and gently scrub the sink. Rinse with cool water.
Place a quarter-size portion of Lime-Away or any gentle lime scale remover on the cloth, and wipe it on any water rings. Let it sit for 5 to 10 minutes.
Scrub and rinse the sink with clear water. Wipe the sink dry with a clean microfiber cloth.
Sprinkle a few drops of mineral oil on the surface. Rub it in with the microfiber cloth.
Always rinse and wipe the sink after use. Clean the sink daily to avoid a build-up of watermarks. Read more about sink choices and installation at homedepot.com. (See Resources.)
Do not use abrasive cleaners on granite surfaces. Do not leave cleaning, hair products or cooking oil on top of granite surfaces. Do not use ammonia or citrus cleaning products on granite. They will corrode the surface.