Engineered StoneEngineered stone countertops are made of 93 percent natural stone and 7 percent polymers and are highly resistant to scratches and stains. "Engineered stone countertops are highly resilient, but high temperatures will damage the polymers and can also damage your counters," says Lichlyter. Use a hot-pot pad when placing heated objects on engineered stone surfaces. For countertops with a smooth and matte look, use a mild soap and water solution to clean and polish the surface.For tough stains: Multipurpose cleaners and detergents applied to scouring pads should take care of tough stains by transferring the dirt from the surface to the pad; the rough pad will not damage your countertop surface.Stay away from: "Avoid using harsh chemicals like bleach or ammonia," says Whitsunday Marble & Granite. "To clean engineered stone we recommend water and a mild detergent. Engineered stone is tough, but not indestructible."More: Get Stone and Ceramic Surfaces Super CleanHow to Care for Your Countertops