Using an artifical grass cleaner will help clean the surface and ensure it always smells great. When an animal urinates on artificial grass, the urine typically settles in the crushed rock base and the backing mat of the synthetic turf. These urine crystals are tough to remove, even with water or vinegar. A product such as smellBgone breaks down the uric acid crystals, deodorises the surface and eliminates the smell for good!