Rinse your turf off with a hose regularly to get rid of any loose debris, pet waste or stickiness.
For particularly troublesome spots, use a mixture of water and vinegar or mild detergent.
Brush frequently to keep the artificial grass blades standing upright with your rake or stiff, non-metal brush. This will help the synthetic fibers stand up straight and mimic natural grass.
If you have children or pets, you will want to clean your turf more often, but otherwise you should clean your artificial grass at least once every three months to avoid the buildup of debris, dirt and dust.