German cockroaches are one of the most persistent pests in Australia — thriving in warm, humid spots like kitchens and bathrooms, with the power to multiply fast and cause serious hygiene issues. This comprehensive guide shows you how to spot the signs of infestation (daytime sightings, droppings, egg casings, and musty odours), and walks you through the most effective prevention tips (clean surfaces, seal food, reduce moisture, secure pet feeding areas). You’ll learn why DIY sprays and baits often fall short, and when it’s time to call in professionals who use advanced tools and techniques to target hidden nests and eggs. Take control of your home environment with smart, proven strategies and keep those roaches at bay for good.