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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.
Herbs/Spices. If you don't have essential oils, you can sprinkle powdered cinnamon, clove, garlic, cayenne pepper, black pepper, salt, mint or bay leaves at entrance points. Soapy water. This is Brie at DIY Life's favorite way to get rid of ants. Fill a spray bottle with 2 tablespoons dish soap and 1/2 cup water. It kills ants and destroys the pheromone trail. It only works when wet, so you'll need to reapply for a few days.