Best overall: Ortho Home Defense Insect Killer - See at Amazon Best contact spray: Raid Ant & Roach Killer Insecticide Spray - See at Amazon Best gel: Advion Cockroach Gel Bait - See at Amazon ...

Your best options will be in the form of bait, which mixes food that attracts roaches with a slow-acting insecticide. Baits are highly effective, making them popular among pest control pros.