The answer to 'how to prevent extermination' is to take proactive steps to prevent pests from entering your home in the first place. This involves sealing up entry points, removing sources of food and water, and using integrated pest management (IPM) techniques to make your home less attractive to pests.
Start by inspecting the exterior of your home and sealing any cracks, crevices, or gaps where pests could get in. Use caulk, steel wool, or other durable materials to close up these entry points. Keep your kitchen and other food storage areas clean and free of crumbs or spills that could attract pests. Eliminate standing water sources like leaky pipes or clogged gutters. Finally, consider using IPM methods like natural repellents, traps, or biological controls to manage pests without relying solely on chemical pesticides.