It doesn’t matter if your outdoor furniture is plastic, wood, metal, or wicker. You can remove the dirt, mildew, and grime with the fizzing carbonating action of club soda. Its mildly acidic so it does the trick easily and can get into all the crevices that harbor dirt. Simply pour over any areas, even cushions, let fizz 5-10 minutes then work up a lather using a soft brush and some dish soap. Rinse off with the hose. You’re done! There’s no need to buy the pricey name-brand club soda, any generic brand will do.