The answer to 'how did extermination get in my house' is that there are several common ways pests can find their way into a home. Pests may enter through cracks, holes, or openings in the home's exterior, or they may be accidentally brought in with groceries, furniture, or other items. Symptoms of a pest infestation may include seeing the pests themselves, finding droppings or nests, or noticing damage to your home or belongings.
If you suspect a pest problem, it's best to address it quickly before the infestation grows. For minor issues, some DIY pest control methods like sealing entry points, using traps, or applying targeted pesticides may be effective. However, for more severe or complex infestations, it's usually best to call in a professional pest control technician. They have the expertise and equipment to properly identify and eliminate the pests in a safe and effective manner.