The answer to 'pest invasion' is that a pest infestation is a common problem that can be caused by a variety of factors, including poor sanitation, cracks and crevices in the home, and the presence of food sources. Symptoms of a pest invasion may include seeing the pests themselves, finding droppings or nests, and damage to food, furniture, or structures.
For minor infestations, homeowners may be able to resolve the issue through DIY methods such as sealing entry points, removing food sources, and using over-the-counter pesticides. However, for larger or more persistent infestations, it is recommended to call a professional pest control technician who can properly identify the pest, assess the extent of the problem, and implement a comprehensive treatment plan.