How do I clean white plastic outdoor furniture?
Rinse plastic outdoor furniture with a garden hose before cleaning. Place 1/4 cup of dishwasher powder or liquid detergent in 1 gallon of water. Wash all furniture with a sponge that is saturated with the detergent, and leave it on the furniture for 30 minutes. Rinse with a garden hose and let it air-dry. When furniture is exposed to outdoor weather, it requires regular maintenance to keep it looking good.