Aerosol and similar sprays are good for getting into cracks, but they only effectively kill one cockroach at a time, says Beninato. “It’s not practical for handling an infestation,” he says.

Get free estimates from top-rated pest control ... what to pour down the drain to kill roaches will find dozens of recommendations from bleach, boiling water, chemical pesticides, and more.

Cockroaches are one ... that humans are always trying to kill them. But no matter how many times we stomp them, squash them, and bomb them with toxic chemicals, these pesky pests always seem ...