This appears to be what he used. He is quite aware of my objection to anything that could harm my kids or dog.
http://www.garrards.com.au/zone_files/pdf/cislin_product_guide.pdf
We use a pest controller who uses "friendly" stuff, a little dob here and there in the cupboards, safe.
Why not go this way. We never see a live cockie. I reckon the geckos help too.