The answer to 'why is my pest infestation' is that pest infestations can be caused by a variety of factors, including improper food storage, moisture problems, and entry points in your home. Common signs of a pest infestation include seeing the pests themselves, finding droppings or nests, and damage to your property.
To address a pest infestation, you'll first need to identify the specific pest and the source of the problem. This may involve inspecting your home, sealing off entry points, and eliminating food sources and breeding grounds. In some cases, you may be able to handle the problem with DIY pest control methods, but for more severe or persistent infestations, it's best to call in a professional pest control technician.