One question for you....do you have any birds constantly around your house? Or a nest somewhere on your house? I just took care of these little suckers called "bird mites" if you google that you can find some helpful info. The main site I used is called birdmite.org (at least I am pretty positive that is the web address. These are terrible...as you mentioned - regular pesticide not only does NOT kill them it aggrivates them and they attach more. Not a lot of people know about these...but I have a pigeon infestation on my roof - they made a nest next to the air conditioner...which in turn sucks in the particles when I turn it on and the mites were all over in the room. A thing that helped me with sleeping is spraying the bed in baby oil. They 'talk' to each other by scent so therefore with the sent of baby oil they will not attack.