How to get rid of German cockroaches in Melbourne apartments

German cockroaches are the small light-brown roaches with two dark stripes behind the head. In Melbourne apartments they usually live around the kitchen, dishwasher, fridge motor, bathroom vanity, bin cupboard and service risers.

The mistake is treating only the unit. A gel-bait and IGR protocol inside your apartment is essential, but heavy buildings also need shared-area pressure reduced: rubbish room, basement, bin chute, pipe penetrations and neighbouring wall cavities.

If you see them during the day, smell a musty oily odour, or keep finding nymphs near the kettle, the colony is established. That is the point where supermarket spray makes things worse by scattering the population.