Q:I have seen advertisements for electronic pest-control devices. You supposedly plug them in and spiders, ants, roaches, other bugs and mice and squirrels depart. How do they work? A:Someone gave me ...

I get a lot of catalogs offering "ultrasonic pest eliminators." I was wondering if these things really do what they claim -- get rid of ants, crickets, roaches and rats. Their advertising doesn't ...

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