Put on disposable gloves and keep pets and kids away from the area first. Bird droppings can carry bacteria, so I wouldn’t dry-brush them—especially on a windy balcony. Dry droppings can also scratch metal, wood, or wicker if you scrape too hard. Outdoor furniture cleaning is mostly about being patient, not scrubbing harder.
Soak the spot with warm water and a little mild dish soap or an enzyme cleaner for 5–10 minutes. For fabric cushions, blot from the outside in and don’t scrub aggressively; for wood and metal, use a soft cloth or sponge. Lift the softened mess with a plastic scraper or an old credit card, then rinse the area really well. For stubborn bird poop stain removal, repeat the soak rather than reaching for a harsh abrasive.
Next, disinfect. Use an EPA-approved disinfectant that’s suitable for the material, or a diluted bleach solution only on nonporous surfaces after testing a hidden spot. When you disinfect outdoor furniture, don’t forget the legs and edges. Rinse again and dry everything thoroughly—standing water is the enemy of wood and metal. For wood furniture, re-oil if the finish looks dry; for fabric, let cushions air-dry completely in the sun. This method works well on most urban patio furniture, and a cover or a quick wipe-down routine will make future bird droppings removal much easier.