An ant trail is useful evidence. Trace it backward before wiping it away so you know where the ants enter and what is rewarding the route.
Remove the food and water payoff
Clean sugar, grease, crumbs, and pet food; move vulnerable foods into sealed containers and dry water around sinks and small appliances. Do not leave dirty dishes overnight during active problems.
Clean the trail after observing it
Ordinary detergent and water remove food residue and surface trail chemicals. There is no need to spray food-preparation surfaces indiscriminately.
Find small entry points
Gaps around windows, pipes, baseboards, and cabinets can become established routes. Seal after you have identified the path and reduced activity so you do not merely redirect traffic to another crack.
Winged ants change the question
A few fliers entering from outdoors are different from repeated emergence from a wall or structural wood. Persistent indoor emergence or suspected wood damage deserves proper identification.
If sanitation does not stop the pattern
A nearby nest or hidden moisture source may be supporting the colony. An integrated pest-management professional can identify the species and target the source instead of coating kitchen surfaces.
The goal is to make the kitchen an unprofitable route: less food, less water, fewer entry points, and a clear understanding of where activity begins.
Sources
- UC IPM — Ants — Ant identification, sanitation, exclusion, trails, and integrated pest management.