Quick answer: Cockroaches are attracted to food crumbs and grease, water from leaks and wet areas, warmth, and dark hiding spots such as cupboard hinges, appliance gaps and clutter. In Queensland’s warm, humid climate they breed quickly, so cutting off food, water and hiding spots is as important as treatment.
The four things cockroaches look for
- Food: crumbs, grease behind the stove, pet food left out overnight, open packets and bins.
- Water: leaking taps, dripping pipes under the sink, damp bathrooms, pot-plant saucers and air-conditioner drip trays.
- Warmth: the motors of fridges, dishwashers and microwaves, and roof voids in summer.
- Hiding spots: cupboard hinges, gaps behind kickboards, cardboard boxes, clutter and wall cracks.
German vs Australian cockroaches
German cockroaches are small (about 1.5 cm) and light brown with two dark stripes behind the head. They live indoors, mostly in kitchens, and breed very quickly. If you see small cockroaches during the day, the infestation is usually well established.
Australian and American cockroaches are large (3–4 cm) and reddish-brown. They usually live outside, in gardens, drains and roof voids, and wander inside on warm, humid nights, especially in summer. They are often a sign of entry points rather than an indoor breeding population.
Why surface sprays often do not work
Supermarket sprays kill the cockroaches you can see, but they can scatter German cockroaches deeper into walls and appliances, and they do not reach the eggs. Professional treatments use gel baits that cockroaches carry back to the nest, plus an insect growth regulator that stops young cockroaches from maturing and breaking the breeding cycle.
How to make your home less attractive
- Wipe benches and sweep the kitchen floor before bed, including under the toaster and microwave.
- Store food, including pet food, in sealed containers.
- Fix leaking taps and pipes, and run bathroom fans to reduce humidity.
- Keep bins sealed and empty them often.
- Remove cardboard boxes and clutter from cupboards and the garage.
- Seal gaps around pipes under sinks and behind appliances.
- Keep garden mulch and leaf litter away from doors and weep holes.
When to call a professional
If you are seeing cockroaches during the day, finding droppings (small black specks) in drawers, or the problem keeps coming back after DIY treatments, it is time for a professional treatment. Xpest identifies the species, treats where they breed and gives you a prevention plan for your home.
Common questions
Do clean homes get cockroaches?
Yes. In Queensland’s climate, even clean homes get cockroaches coming in from outside or through shared walls. Good hygiene makes treatments work faster and last longer.
Why do I see cockroaches during the day?
Cockroaches are mostly nocturnal. Seeing them during the day, especially small German cockroaches, usually means a large population that is running out of hiding space.
Are cockroaches dangerous?
They can carry bacteria and contaminate food and surfaces, and their droppings and shed skins can trigger allergies and asthma in some people.
Related: Cockroach control · Xpest services Sydney, NSW and the Brisbane, QLDSunshine Coast, QLD.