...I’ll ever make the balcony a pigeon-free or droppings-free zone. But I have made progress.
One trick is to not let them lay their eggs in the flower pots and the flower bed.
By observing them I have seen that they make a nest by collecting twigs and leaves. They can collect a significant quantity in just a day, so I need to be vigilant and whenever I see them flying to and from the balcony I start looking: chances are there’ll be the beginnings of a nest somewhere. So I put on my disposable latex gloves and throw away the twigs. Then I rearrange the flower pots to make the spot inaccessible for a day or so. They forget all about the old nest, and take their business elsewhere.
It was by spritzing them with the water hose for a couple of days that I re-instated their natural fear in people. I felt like such a bitch to do this, but they got the message and now when they see me outside they fly away by themselves, and this is a relief! They were getting so cheeky, you could almost touch them and they wouldn’t fly away!
By watering the flowers in the evening, I have made the balcony less appealing to them. When they get splashed they fly away, and they’re so sleepy they’ll fall asleep somewhere else.
Pigeons can be very persistent when they operate on autopilot, but also have a short attention span. If you can somehow distract them and make them change their patterns of behavior, they adhere quite well to the new situation.
Our balcony is still a place where they can rest a bit and drink some water. I try to be discrete when they’re thirsty and I have the droppings to prove it, but other than that, I’m sending out the message that they need to move on.