Kills Bugs Dead. Raid® Double Control Large Roach Baits kill the roaches you see as well as the ones you don't see with two types of bait. After roaches feed on the bait, they return to the nest and transfer the bait to the others, thereby killing the entire nest. Population reduction and less activity can be expected within days, with the baits working continuously for up to three months. Raid® Double Control Large Roach Baits are child-resistant. Use indoors in corners, along walls and near entry points to kill roaches where they hide. For maximum effectiveness, place all baits at the same time. Avoid placing baits directly on top of surfaces treated with a Raid® spray product to make sure roaches can bring the bait back to where they hide.