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You don't need insecticides or ant traps to ant-proof your kitchen. Just give it the lemon treatment. First squirt some lemon juice on door thresholds and windowsills. Then squeeze lemon juice into any holes or cracks where the ants are getting in.
1 Diatomaceous earth is a fine powder that kills ants by pulling all the moisture from their bodies. 2  It works by absorbing moisture from the ant itself, but it's best used in dry environments. 3  You also don't want anyone in the house (especially pets and children) sniffing it up. 4  Try using salt. You also don't want anyone in the house (especially pets and children) sniffing it up. 2  Try using salt. 3  It has a similar drying-out effect on ants, especially if they carry it back to their nests. 4  You can spread it under doors, near windows, and along the edges of your walls.