Use Maheu&Maheu Insecticide Dust
around heating systems to avoid the fire risk posed by liquid insecticide. Insecticide dust should also be sprayed onto pipes, under the bath (sometimes there is a trap door that provides access through an adjacent closet), and near the hot water heater, as well as in other more hard-to-get-at places. Also remove electrical outlet and switch covers and sprinkle dust inside the walls. Another good idea is to spray Maheu&Maheu Crawling Insect Killer
around room perimeters and up vertical surfaces where dust will not adhere. When these pests are found in apartment buildings, it is best to treat the whole building because they can spread from one apartment to another along electrical wiring, pipes, etc.