The most effective indoor ant baits are slow-acting formulations that the workers can carry back to the nest so the toxicant passes through the colony.

Choose a bait based on the ants’ feeding preference and the active ingredient. Observe whether ants are attracted to sweets or to protein and grease, then select a sugar-based bait for sweet-foraging species and a protein or oil-based bait for protein-foraging species. Prefer slow-acting toxicants such as borax mixed with a palatable attractant because the delayed mortality lets workers share the bait with brood and the queen before dying. Use small gel stations or placed granular stations depending on where ants forage; gels are excellent for cracks, crevices, and along baseboards while granules work well on counters and other open surfaces. Place baits directly on or adjacent to active trails and avoid disturbing the trail while you set them, since sudden cleaning or spraying will cause workers to switch to other food sources. If a bait shows no activity after three to five days, rotate to a different bait type and ingredient because colonies can be bait-averse or prefer a different nutrient at different times.

Common mistakes include using fast-acting sprays or powders that kill visible workers but prevent transfer to the colony, so avoid contact insecticides near bait placements and focus on baiting instead. Another issue is misidentifying feeding preference and offering the wrong bait, which is why you should watch what the ants are carrying and try both a sweet and a protein option if unsure. A third concern is placing baits in areas that are inaccessible or that get disturbed frequently, which reduces uptake; place small discrete stations on the trail, out of reach of pets and children, and do not clean or apply other chemicals there until activity declines.

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