Taking care of and cleaning quartz countertops is straightforward and simple. Unlike granite and marble, quartz countertops do not need any maintenance and never require sealing or polishing. To clean quartz countertops, use water and a soft cotton cloth. Use a mild soap if desired , but avoid harsh cleaners. Check with the quartz company or retailer for a list of approved cleaning products. Do not use any products that claim to be quartz sealants or polishing agents.