German cockroaches favor warm, humid spaces near food and water — kitchens, behind appliances, under sinks — and Mchenry's a humid climate with hot summers and winters cold enough for sustained snow cover most years keeps them active most of the year. American cockroaches, larger and reddish-brown, prefer basements, drains, and utility rooms. Housing spans century-old city bungalow neighborhoods to newer subdivisions throughout the collar counties.
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.