Everyone asks me how to clean and maintain their quartz countertops. They are non-porous, antimicrobial, and stain proof so a heavy duty cleaner isn't really needed. Quartz is not scratch proof but pretty tough, always use a non-scratch pad when cleaning as to not effect the polish. I don't recommend using a Magic Eraser except in cases of tough spots due to it's abrasive characteristics towards the polished surface.