Cockroaches are a problem all over the country, but especially in big cities. If you see one—usually in the kitchen or bathroom—you can be sure there are many more unseen. Once they've moved in, cockroaches are difficult to dislodge, so take strong, swift, and sustained action. Lay down insecticide or roach traps under the sink, behind the toilet, alongside the fridge, or in other places where they may lurk. Change traps and reapply insecticide on a regular basis to combat new cockroaches as they hatch. In addition, take preventive measures to make your home less attractive. Eliminate their food sources by cleaning up immediately after meals, storing your food in sealed packages, and taking out the trash daily. To be especially thorough, you may also want to remove any leftover kibble from pet bowls when dogs and cats have finished eating.