Regular cleaning should be done with a mild soap or detergent and a soft cloth. Make sure the soap is non-bleach and non-abrasive. Wipe up liquids as soon as possible. Quartz will resist stains for a short period of time, but all colored liquids should be cleaned up promptly. A glass or surface cleaner, such as Windex, can be used for heavy or dried on stains. Scrape away grease, gum, and paint with a plastic putty knife or razor blade. Use a degreasing cleanser, formulated for Quartz countertops, to clean off grease. Rinse away immediately. Remove ink or permanent markers carefully with an oil-based cleaner, like Goo Gone. Rinse with warm water immediately after the stain is removed. Heavy, stuck on, hard to remove stains such as nail polish can be removed with a mixture of acetone, Ajax, and water. Dilute the Ajax to the point of minimal abrasiveness. Wipe away immediately.