Synthetic grass that has been urinated on repeatedly by your pets (usually dogs) is likely to start smelling quite strongly, especially on hot or humid days where the uric acid crystals (the source of the urine smell) are activated and release the odour.
Artificial grass is usually built on a crush rock and sand base with small holes in the material to allow for drainage. Urine tends to seep through the grass, into the rock and sand. When urine dries, it crystalises and it is these uric acid crystals that are difficult to remove.
Conventional cleaners and water will not break down the non-soluble uric acid crystals and they will remain. Only a bio-enzymatic formulation like the one found in urineFREE will remove uric acid crystals for good. urineFREE’s bio-enzymatic action is designed to “eat” these crystals along with the water soluble components of urine.