My husband and I moved into a house and have a slight issue with oriental cockroaches. For some odd reason they are entering in and often found on the ceiling upstairs next to our ceiling fan. We have a pest control guy every three months come and put granules/or spray around or house and he’s been inside a couple of times to spray around the base boards but we still see them. For the first couple of months they appear to be dying as they stagger out of hiding spots because of the poison then before too long they we don’t see them anymore then a few weeks later, they show up again. Is this going to be an ongoing problem? Also how can I convince my husband that they are not going to hide and lay eggs in our furniture. He’s worried that when we sell this house, they are going to lurk and hide in our stuff and follow us. Advice?