Comment Re:Bedbugs in apartments (Score 2) 69
I work in pest control, and unfortunately it is a matter of cost and expertise. Bedbugs were wiped out almost world wide when we used DDT, but as happens when you expose populations to a single chemical long term the ones that survived developed resistance. It just so happens that pyrethroids (the most common class of pesticide used non-agriculturally now) have the same chemical mode of action as DDT, so when air travel become commonplace, they spread everywhere and were highly resistant to most of the tools exterminators had.
Now the newer products work much better, but are expensive and STILL require a lot of prep to be 100% effective. 90% of the bed bugs will be in the bed, but especially as populations rise they will spread out all over the room (and through the walls as you know). You have to wash all your clothes and sheets (high heat for 30 minutes to kill the eggs), you have to place all other random items in bags and use treatment in those, you have to pull out all your dresser drawers and treat those as well as inside the dresser etc etc. Basically every available surface, even up the the ceiling has to be treated, as well as inside the walls. You do all of that, but if just one pregnant female survives, and you'll end up in the same situation months later. I explain all this to people who have them but when I show up to treat it 9/10 times they haven't done it all so I have to either walk away or spend an extra hour doing it for them. Too often people just aren't willing to be thorough, poor or not
Treating just one room in a house is bad enough, but if you have a hotel or other multiunit building, its game over unless the ENTIRE building is treated. Then people bring more in from travel or their friends/family members who are too much of a mess to take care of it and the cycle starts again.