What's your hack against pigeon birds' mess. Help 🐦

Hi .. pigeon birds are shitting all around in our balcony passage. Fed up of cleaning it again and again. So, I want to know what's your hacks to keep them away. We are considering to get a net. Is that the best cost effective solution out there. If yes, could you pls let me know where I can purchase it in Mysuru. Or any contact person who could install the net for us. TIA! 🙏🐦🥅