Dust the parts of the surfaces until a thin surface layer of dust is formed, in particular the corners or crevices and where insects tend to pass or hide. Correctly identify the areas in which insects pass from, hide or reproduce to increase the effectiveness of the method. It should be applied with particular care in dark and warm places, basements and warehouses. Also, in areas around water, heating and ventilation pipes, under cabinets and other bulky objects. Repeat application only when live insects start to appear again.