3. Dish detergent
Due to their reliance on their sense of smell, cutting off the ants’ scent trail is one of the most effective ways to keep them out of your house. To do this, fill a spray bottle with water and add 1/4 a cup of dish detergent. Find the places the ants are using to access your home and spray these areas with your mixture. This will kill most of the ants that try to come into your house and those that survive will lose their original scent trail, leaving them unable to lead other ants back to your home.