To combat this, seal cracks and crevices around ... they really don’t have any effect.” “Bleach can kill cockroaches if they ingest it, but it is generally not recommended as a solution ...

Try cockroach bait gels such as Combat Max Roach Bait, available at Target, along cracks and crevices to lure them out from their sheltered positions. "Roaches also prefer to be in close proximity ...