Perfect regular sweeping of your paving stone patio, walkway or driveway. To avoid using a pressure washer, regularly clean loose dirt and debris on hard-scape with a broom and/or gentle soap when necessary. Use a soft-bristle brush or broom. Hose to remove the residue. If you stick to your cleaning routine, you will notice that using a pressure washer or chemical cleaner will not be necessary in many occasions.