While the quick cleaning power of a pressure washer is tempting, it is generally not recommended for Polywood urban outdoor furniture. Polywood is made from high-density polyethylene (HDPE) plastic and is designed to be low-maintenance, but its surface can be sensitive to extreme force. Using a power washer, especially at a high PSI (pressure per square inch), can etch the material, create surface grooves that trap dirt, and potentially strip away the UV-inhibiting pigments that prevent fading. Over time, this can compromise the furniture's appearance and structural integrity.
For safe and effective cleaning, a much gentler approach is best. Mix a mild soap, like dish detergent, with warm water. Use a soft-bristled brush or a non-abrasive cloth to scrub the surfaces, then rinse thoroughly with a garden hose on a gentle shower setting. This method easily removes common dirt, pollen, and mildew without risk. For stubborn stains, a specialized plastic cleaner is a safer alternative. By avoiding high-pressure water, you ensure your Polywood furniture retains its vibrant color and smooth texture for many seasons, protecting your investment and keeping your outdoor space looking its best.