How to remove persistent substances and stains?

The effect of grease and/or oil stains is aesthetic and does not damage the stone surface. If possible, stains should be removed freshly to prevent the dirt from being absorbed and adhering. Grease or oil is removed with paper, sawdust or other absorbent material. Afterwards, the stone surface is washed by pressure washing or hot water brushing. Dishwashing detergent can be added during washing for better results. The stone surface must be rinsed after treatment with the detergent. If the above does not work, we recommend replacing the dirty stones with new ones. To remove chewing gum, we recommend using hot water or a pressure washer.