Applying high heat is a more effective than chemical applications when it comes to terminating bed bugs. Bed bugs are more resistant than ever to insecticides, meaning chemicals may not be able to destroy all insects at every stage of life. On the other hand, bed bugs cannot physically withstand the heat, making heat the effective, sure-fire way to destroy pests. And while chemical treatments can take several rounds to ensure pests are terminated, residential spaces only require one heat treatment.