Traps are the most effective way to monitor cockroach populations. By placing traps in multiple locations and inspecting them on a regular basis, you can identify the areas with the most severe infestations and determine where to focus control efforts. Traps can also be very useful in determining the efficacy of cockroach pest control strategies. Cockroach traps should be placed in areas where cockroaches are likely to come across them while foraging. The best locations are at the intersections of floors and walls, as well as near sites where cockroaches are suspected; good potential monitoring sites can be identified by faecal matter accumulations (e.g., dark spots or smears), cast skins, egg cases, and live cockroaches. Place traps in all four corners of the room to determine where the roaches are entering. Place traps against the walls behind the stove and refrigerator, as well as in cabinets, in the kitchen.