Cockroaches need three things to establish a colony: food, water, and warmth. China's housing stock gives them exactly that. A mix of established Houston-area neighborhoods and rapidly expanding new suburban development, nearly all on slab foundations. Combined with China's climate — a climate defined by heat, humidity, and flood risk given the region's flat, low-lying terrain — indoor cockroach pressure rarely lets up on its own.
We start with an inspection to identify the species and the source — sanitation issue, moisture problem, or entry point. Treatment centers on gel bait placed in cracks, voids, and under appliances, not broadcast spraying, since German cockroaches in particular have developed resistance to many surface sprays. A follow-up visit confirms the bait is working and the population is dropping.