To clean artificial grass, hose it down once a week with a solution of equal parts vinegar and water, which will kill any bacteria that may have collected in its blades. If your grass has any stains such as coffee, wine, or ice cream, mix 1 pint of granular detergent and 1 teaspoon of water and use a cloth to rub the stain until it is gone. Once this is removed, you can wash off the detergent with a garden hose. To give your artificial grass a more natural look, brush it regularly with a broom or rake, as this will keep the grass blades upright. For more help, including using mineral spirits to remove concrete debris, read on.