If they are in you oven turning on the heat or the oven cleaning cycle be prepared for those roaches come out of your oven every space they can. I helped a friend move into this house there were roaches coming out of the stove when she cooked and we moved the frig they were crawling every where she got out of the lease we went by the house 2 days after they had a dome of plastic around the house fumigated it. We saw the stove and refrigerator out for big trash pick up. No we went out to eat and what she moved in she left. The bug man said to use boric acid powder but its dangerous if you have children or pets.