Dust products are useful components of a complete bed bug treatment, and can be used in places where Aprehend may be less effective, such as under carpet edges around baseboard areas. Providing dust is not applied in the same locations as Aprehend, it does not matter which product is applied first. However, Aprehend and dust products will cancel out each other’s effect if applied on top of each other, so always ensure that they are used in separate locations.