The answer to 'how did pest get in my house' is that pests can enter your home through a variety of ways, such as cracks, holes, or gaps in the building's exterior, open windows and doors, or even being brought in with deliveries or on your clothing. Common signs of a pest infestation include seeing the pests themselves, finding droppings, or noticing damage to food, furniture, or other household items.
To address a pest problem, it's important to first identify the type of pest and how they are entering your home. Sealing up entry points, removing food sources, and using targeted pest control methods can help eliminate the infestation. However, for severe or persistent pest problems, it's often best to call in a professional pest control technician who can properly assess the situation and implement the most effective treatment plan.