Dissolve some mild dish detergent in water and soak a clean cloth in the solution.
Wipe the aluminum furniture with the cloth to remove any dirt or marks. Rinse the cleaner off thoroughly.
Dry the patio furniture with a soft cloth.
Rub car wax onto the surface of the aluminum with another soft cloth. Buff off the wax when it's dry.
Fill a bucket with 1 gallon warm water and 3 Tbsp. dishwasher detergent. Mix it together and soak a sponge in the solution.
Wipe the plastic patio furniture with the soaked sponge, focusing especially on dirty areas.
Leave the solution on the furniture for 15 minutes, then rinse it off. The bleach in the detergent whitens the furniture as it sits.