Don’t use glue traps, sticky substances, or anything that hurts the birds. Pigeons are a nuisance, sure, but they’re also living creatures just trying to find cheap rent. We’re going for deterrent, not destruction.
Also, don’t trap them. That’s illegal in many places, and it’s super weird. You don’t want to become “the pigeon collector” in your building’s gossip circle.
And please, for the love of all that is holy, don’t feed them to “make them go away.” That’s like trying to get rid of a party guest by handing out free drinks. It backfires every time.