Stamp Out Their Trail
When ants enter your home, they leave a scented trail behind them for other ants to follow. That's why you usually see ants in groups and rarely a lone wolf. If you've noticed an ant coming into your kitchen, clean the area with a mixture of equal parts vinegar and water. This won't kill the ants that are already in your house, but it will get rid of their smell so more ants can't follow.