Do roaches come back after extermination?

There’s always a chance that roaches could return, finding new entry points from outside or hatching from eggs you hadn’t known were there when you took care of the adults. If they do, add a few drops of gel bait to deal with the new invaders. Then, do an even more thorough inspection of the outside of your home—they’re finding a way in somehow. Finding and sealing that entry point is the key to keeping them out.

Does roach bait attract more roaches?

Roach bait won’t attract more roaches to your home. It might bring more out into the open as the bait makes the bugs want to feed on it but it will inevitably kill those that do emerge. If it seems to attract more from various hiding places, it only means it’s doing its job.