I saw 2 in my lounge last night! I have checked out websites and know there are lots of products available but its recommended a professional company come out to do it. (I can get it done cheaper through my council, but its not all that cheap and might take several gos). I live in a flat in a converted Victorian house and I have 4 different neighbours surrounding me and there are many food outlets below. I am pretty sure they are coming in from elsewhere as I have not discovered any evidence of them in the kitchen. We recently eradicated a mouse problem (Crikey, I sound like a right slut!) so all food stuff is in airtight containers and I am clean...I am! I am! It's impossible for me to block up the gaps, of which there are loads - flat has bare floorboards and the two cockroaches scuttled away under them last night. One of my neighbours is away and has been for a couple of months, I don't know when they are back - it could be a while, I was thinking that they could be coming in from there if they have left something out that the roaches are feeding on. Bleurrghh! I don't want to pay for professional service if they are going to keep returning back from a neighbouring property. If I buy some spray/powder through the gaps in floorboards will this stop them coming in? Will they still wander around/reside/sleep under my floorboards if there is no food in here? And has anyone got any recommendations on a brand, I hear ones from the supermarket aren't much good.