Pesticides that are used to treat bed bugs will only affect bed bugs that are exposed to it. Chemicals do not kill eggs. Since eggs are not killed by chemicals, pest management professionals that choose this method must return to the property many times, waiting for eggs to hatch, to repeat the insecticide treatment. Sometimes even live bed bugs may not come into contact with the spray for a variety of reasons, such as taking a route out of a unknown nesting area that was missed, or ‘piggy backing’ over a bug or other surface. It is unknown ahead of time how many spray treatments it will take to eventually kill all of the bed bugs, sometimes never. We’ve had customers call us after 4, 5, even as many as 8 sprays and thousands of dollars spent and still fighting bed bugs. Recent academic studies have proven that bed bugs are becoming resistant to pesticides, meaning that more chemicals are required to be sprayed in a treatment to have the same effectiveness as they used to. This is why we use a combination spray and heat treatment – because the heat is the main method of attack and kills bugs and eggs wherever they are hiding, we perform a basic spray treatment as a secondary measure. This combination is why we are confident to guarantee our services.