Hate roaches ! I was infested awhile back from a box we brought home from a garage sale.
I sprayed and sprayed and couldn't get rid of them. Then my son was over at a friend's house, which was a pig sty, but no roaches. He used Combat roach houses. I bought some, and put 4 in each room. The next day I found dead roaches all around the houses. I also put some in back of my material stash.
I change the houses out every three months. I marked on the house, in white out, the month I put them out. I don't have roaches anymore!!
Syl