Place pieces of vanilla beans around the area
Get empty margarine containers, or grease the *inside* tops of jars with margarine. Pour about 1/2 an inch of wine or beer, or a slice of banana, in the containers. Leave overnight where the cockroaches appear; they’ll be attracted by the wine or beer, climb in the container, and be unable to climb out because of the grease. Tip the trapped roaches into boiling water to kill.
Sprinkle Epsom salts around, replenishing every few weeks for best results.
Mix borax and sugar in equal parts, and place in cupboards where roaches live.