Ant Control in a Loft: Baits Beat Sprays

Surface sprays kill only the ants you see. For lasting control, use baits—liquid or gel formulations—that foraging ants carry back to the colony, spreading the toxin to the queen and other members. Place baits near ant trails but out of reach of pets and children.

Both liquid bait stations and syringe-applied gels are available at hardware stores. Be patient; it may take a week or two for the colony to collapse. Avoid spraying insecticides near baits, as this can deter ants from taking the bait.