Honestly, for most urban outdoor furniture, soap and water is the first line of defense—not a special product. In a city, your patio chairs, balcony table, or rooftop sofa are exposed to pollution, dust, bird droppings, and rain, so routine cleaning matters more than buying a fancy bottle.
Start with a mild dish soap or castile soap, warm water, and a soft brush or microfiber cloth. Rinse well and dry. That handles everyday grime on powder-coated metal, aluminum, plastic, and most resin wicker.
But soap and water is not always enough. If you have teak or untreated wood, you may need a dedicated outdoor furniture cleaner or wood cleaner to avoid graying and mildew. For fabric cushions, check the care tag; many need mild soap and water, but some require a fabric-specific cleaner or professional cleaning. Metal furniture with rust spots may need a rust remover and touch-up paint. Wicker, rattan, and mesh can trap city soot, so a soft brush and a gentle cleaner help.
Avoid bleach, ammonia, abrasive pads, and harsh degreasers unless the manufacturer says otherwise. They can fade finishes, corrode metal, or damage wicker. Always test a hidden spot first.
So: use soap and water for regular cleaning, but keep a material-specific outdoor furniture cleaner on hand for stains, mildew, and seasonal deep cleans. That's the practical balance in an urban environment.