As well as the above it’s also essential you eliminate any food sources for the cockroaches (especially in cupboards. Crumbs and food scraps (no matter how small) will keep them coming in.
Best genral approach is a bomb (fogger). Follow the instructions on the can and it’ll do a good job of eliminating (or minimising) their prevalence. If you’re in a block of units you’ll never kill them all
As well as the above it’s also essential you eliminate any food sources for the cockroaches (especially in cupboards. Crumbs and food scraps (no matter how small) will keep them coming in.
Best genral approach is a bomb (fogger). Follow the instructions on the can and it’ll do a good job of eliminating (or minimising) their prevalence. If you’re in a block of units you’ll never kill them all