Bed bugs spend most of their day hiding in tight, dark spaces throughout a bedroom. They have slow digestive systems, so they’re usually either processing their last meal or sleeping. When it’s time to feed, they are drawn out by the carbon dioxide and body heat that is emitted by their host, most often a person sleeping in a bed.
Bed bugs are not likely to come out of their hiding places unless they detect these signs of a warm body nearby. This makes it difficult to kill bed bugs in certain situations, such as when an infestation spreads to a guest room or a hotel room.
If you want to monitor a regularly occupied room, like a bedroom with a permanent resident, passive monitors make more sense. They will be just as effective as an active monitor in this situation, and will usually cost less. They also tend to involve less maintenance over time; there usually isn’t a cartridge or bottle to swap out, and ClimbUp Interceptors only need some talcum powder every now and then.