The surfaces of all Marblellous products have been processed to be hydrophobic and oilproof, in order not to stain by substances such as oil, wine, soft drinks, ink, slag, air pollutants, etc. Avoiding putting the marble objects in the dishwasher is recommended. Please, also avoid contact with harsh agents such as bleach, hydrochloric acid, citric acid or other strong corrosive substances, either acidic or alkaline. Fats and oils may deteriorate surfaces, after prolonged contact. Use green soap and water for proper maintenance and cleaning or cleaners with a neutral Ph. Marble surfaces are ultra-hard, however some metallic and/or sharp utensils may cause scratches.