Plastic folding chairs – The plastic patio chairs are durable, lightweight and waterproof. These chairs can last many years if they are cleaned and stored properly. Pollutants from the air, bird droppings, tree sap, food and even perspiration or suntan oils make the chairs dingy.
Clean them at least once a week during heavy use. Remove leaves and other stain-causing debris from the plastic folding chairs. Rinse chairs with a garden hose. Mix 1 tbsp. liquid dishwashing detergent with the water in a 5-gallon bucket. Use a soft sponge to dry cleaning mixture over the plastic chairs. Scrub away stains – pour dish soap directly on the heavily stained areas and scrub it until clean. Rinse off chairs with the garden hose. Use a towel to dry them thoroughly.
Put a dime-size amount of non-abrasive car wax on a soft cloth. Rub this in a thin layer over the plastic folding chairs. Wipe off excess with a clean cloth or towel. According patio-living.com, this will prevent stains. Put an outdoor furniture cover up the chairs when not in use. This protects them from dust, bird droppings, tree sap and other stain-causing substances. If you stack the chairs, make sure they are dry; moisture trapped between the seats can cause mildew.