Cockroaches are just too good at hiding and too good at multiplying for amateurs to have a chance. This work must be carried out by an experienced professional pest operative.
One of the best of these cockroach treatments is carrying out a baiting programme as cockroaches are nocturnal and can live in inaccessible cracks or near electrical wiring where it is not possible to use sprays. The baits are placed where the cockroaches are active. Cockroaches are cannibals and will feed off their own dead so cockroaches which feed off a poisoned insect will die of secondary poisoning.
Although other signs of an infestation include smear marks or droppings, cast skins, egg cases, an almond-like smell or dead insects, cockroaches are very visible at night time.