Rinse down the patio furniture with a garden hose.
Pour 1 gallon hot water, 2 tbsp. dish soap and 1 cup vinegar in a bucket. The vinegar is a natural disinfectant that will kill the mold, while the dish soap assists in the overall cleaning of the lawn furniture.
Dip a cleaning rag in the bucket and squeeze the rag to remove excess cleaner.
Wipe over the patio furniture, applying pressure as needed to remove areas of mold.
Rinse the patio furniture after it is cleaned to your satisfaction and set it in the sunlight to air-dry.