How's that for a question? These days it seems like bedbugs are immune to pesticides and insecticide and everything in between. So what's the deal? Well even from the very early introduction of bedbugs back into our society they have been heartier then your average bear. Having a high resistance to insecticide was the norm. Even these days there is evidence that the bedbugs are becoming resistant to the new class of chemicals that have been used to try to control them called Neonicotinoids.
So just what can we do to kill bedbugs? Like in the past, it is important to use a variety of techniques. This would include using a variety of insecticides and mechanical controls to help with the remediation. Using mattress and box spring covers, pulling back carpets to dust under baseboards, drilling holes in the wall voids to dust with an insecticide. These are all tools that will help you on your path to being bedbug free.
The other option to kill bedbugs is heat. Many companies these days will provide a technique where they will come into your home and raise the temperature to a certain degree above 120 where they will hold that temperature for about 3 to 4 hours. During this time period they will enter the home to move furniture around, lift mattresses and box springs, and things like that which will help to get the heat where it needs to go to kill the bedbugs. This is an expensive procedure, but very effective.