Bot flies can be a nuisance around outdoor trash cans, but there are several effective methods to keep them away. First, ensure your trash cans have tight-fitting lids to prevent flies from accessing waste. Regularly clean the bins with a mixture of water and vinegar or bleach to eliminate odors and residues that attract flies. Using trash bags and sealing them properly can also reduce fly attraction. Additionally, consider placing fly traps or natural repellents like mint or eucalyptus near the bins. Finally, schedule frequent trash pickups to avoid prolonged exposure of waste. By following these steps, you can significantly reduce the presence of bot flies around your outdoor trash cans.