Everything I've read about these pests on the Internet says that with the cold weather, they will die, end of problem. We are getting them in the house and it is mid November here in Ontario and we have had more than one killer frost as well as snow. We realized in the Fall that one source of their entry was the bathroom ceiling fan vent - a metal screen was placed over that on the roof and we sprayed and removed the nest but we are still getting them in our bedroom. We have narrowed the search for an entry point to a wall between the old part of our house and a new addition with the entry being a spot where a piece of siding is missing. Since they are protected from the cold somewhat by their location, will they still die out or will they be with us in the house all winter. The ones emerging into the house at a rate of 3 or 4 a day, are dozy and slow, but a couple of weeks ago before the coldest weather hit, I was stung by one when I encountered in unbeknownst to me until the sting. Any info. you can give us about our problem will be most appreciated. Thanks, Alice