Borax is a naturally occurring mineral salt. This fine white powder acts as a stain remover and has disinfectant qualities as well.
Borax is useful for killing cockroaches, silver fish and ants, and although poisonous when swallowed, is absolutely odourless. This is in marked contrast to most insect sprays.
Simply mix together equal parts borax and icing sugar as a bait, OR sprinkle borax powder in the back of cupboards and in cracks and crevices. The borax will stick to the legs of insect pests such as cockroaches, ants and silver fish, the insects will lick themselves clean and then die.