If you do happen to spill something on your turf or notice a stain, you should clean it immediately. Cleaning the area as soon as possible will prevent the mess from setting and causing lasting damage. Pick up as much of the mess as you can and for any liquid, use a towel to soak it up. Then simply hose down the area to rinse it off. If you get something sticky like tree sap on the grass, the easiest way to get it off without spreading, is to freeze it and peel it off once it has hardened. This is the most efficient way which avoids harsh chemicals that could leave irreversible damage to your artificial lawn.