I only spray one spot that's a gap under the wall. I saw a HUGE redback crawl in there one day and the gap goes through to my kitchen so I didn't want anything getting in. DD can't get the sprayed area in there though. We have however sprayed around the granny flat because there were heaps of redbacks around there and it's near DD's cubby house area. That was after I spotted quite a few fully grown females getting around and it scared the hell out of me

HTH