Cockroaches generally dislike the strong, acidic scent of vinegar because its pungent acetic acid vapor disrupts their sensory receptors and communication trails. While spraying undiluted white vinegar can temporarily deter roaches from crossing treated surfaces or clean countertops, it acts only as a mild, short-term repellent rather than a lethal extermination method, and it will not eliminate an underlying hidden infestation.
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