Forget rat exterminators and expensive traps, says rodent expert Bobby Corrigan. His silver bullet for deterring rats involves some discipline and bleach.The big picture: Rats usually don't return to places where they can't find food. The trick is to keep alleyways, sidewalks, and homes clear of food scraps and messy garbage cans.Get market news worthy of your time with Axios Markets. Subscribe for free.It's a simple rule-of-thumb to follow when you have a rat problem, according to Corrigan, who

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