As a rule of thumb I don't go after anything that ends up in my home. I just capture it in a cup and give it the boot outside before my cats get to it. Even the spiders. In fact, for one year in the late fall, we had shelled spiders outside our house that spun huge webs. Very good at capturing all the mosquitoes around during the summer. And, surprisingly were hardy enough to survive up until we started getting -10 weather.