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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.
Preventing Ants from Entering the Home. 1  Take a look around the house for any cracks in the foundation where ants could be gaining access into the house. If there are any areas they need to be sealed. 2  Check windows and screens to make sure they close as they should.