We’ve had some uninvited houseguests for years. I’m talking about ants. Although we’ve tried to make it clear that they’re unwelcome, they keep coming over unannounced. We’ve found only one thing that prevents them from stopping by every day—a mixture of poison and sugar sprinkled around the perimeter of our home. Combining the two ingredients means that the ants gobble up the toxin along with the sweet stuff, and experience the lethal results.