Why Do Ants Keep Coming Back After I Clean Them Up?
Removing the ants you can see doesn't necessarily remove the reason they're entering.
By Everyday Home Advice Editorial Team

Removing the ants you can see doesn't necessarily remove the reason they're entering.
Follow the trail
Ant activity can provide clues about the entry point, food source, and water source.
Clean food residue
Pay attention to crumbs, spills, pet food, and sweet residues.
Look for moisture
Some ant activity may be associated with available water.
Don't rely only on killing visible ants
The visible workers may represent only a small portion of the colony.
Seal entry points carefully
Exclusion can help, but don't start randomly sealing every exterior opening without understanding what the opening does.
When should I get help?
Consider pest-control help when activity keeps returning, is widespread, involves an uncertain species, or appears connected to structural moisture or damage. Find Local Pest Control Help