If you want to avoid chemicals entirely, you can use scents that ants find offensive. Peppermint oil is a classic. Mix 10-15 drops with water in a spray bottle. Spritz around windowsills, doorframes, and their entry points. It won’t kill them, but it’s like putting a wall of stinky mint in their way.
Other weird tricks: cinnamon (powder or sticks), coffee grounds, or even slices of cucumber. These are not foolproof—a really determined ant will walk through a mountain of cinnamon for a taste of your cat’s food bowl—but they work as a gentle deterrent. Plus, your house will smell like a holiday bake sale. Win-win-ish.
But let’s be honest: if you have a serious infestation, skipping the baits and relying on peppermint oil is like fighting a wildfire with a squirt gun. Use these as maintenance, not a nuclear option.