Remove any chair cushions and tablecloths from the furniture. Place the furniture on a cement surface away from dirt and grass to avoid getting it dirty again.
Wet the furniture thoroughly with a hose. Add 1 tbsp. dish soap to a large bucket, and fill the bucket with water.
Dip a sponge into the soapy water, and use it to wipe down the furniture. Use circular motions to get rid of all the dirt and debris.
Rinse the soap off of the furniture with the hose, and allow it to air-dry.
Squeeze a quarter-sized amount of liquid car wax onto a soft cloth, and apply it to the furniture using circular motions. Keep adding the liquid wax to the cloth as you cover all your furniture. Buff it to a shine with a clean, soft cloth once the wax dries. Repeat this every six months for optimal results.