In a severe indoor roach infestation, rather than relying on sprays or baits, use a HEPA vacuum to physically remove the majority of the roaches. On the other hand, those living in southern regions or consistently warm areas of the United States will deal with outdoor cockroach infestations year-round, as the warmer temperatures allow the cockroaches to. "The warmer it is, the faster they can complete their reproduction cycle," he said.Those living in colder northern locales will see a reduction in outdoor cockroach infestations as the weather cools in fall and winter.
This is the brand I use, but there are others… It comes in syringes with plastic tips to easily get the gel in those tight spots.Roaches are cold-blooded, and the warm weather allows them to live in a habitat where they can thrive, Curtis said.
Answer (1 of 4): Thoroughly clean cabinets, drawers, etc… then apply a "roach gel" in cracks, crevices, around water lines (places where roaches get in or can hide).