If that is true then the only recourse will be antiparasitic drugs. Ivermectin seems to kill bedbugs but not for very long. Fluralaner seems promising.
It’s very interesting that when we treat animals for parasites we treat the animal itself but for humans we believe that something as nebulous as “treating the space” is actually possible.
When the world is ready to actual solve bedbugs it’ll solve them through a pill you take.