The answer to 'why is my silverfish infestation' is that silverfish are common household pests that thrive in damp, dark environments. They feed on starch, cellulose, and sugary foods, and can often be found in bathrooms, kitchens, and other areas with high moisture levels. Silverfish infestations are typically caused by excess moisture, lack of cleaning and organization, and entry points in the home.
Symptoms of a silverfish infestation include seeing the insects themselves, finding their shed exoskeletons, and finding damage to paper products, fabrics, and other materials they feed on. To solve a silverfish problem, you'll need to identify and eliminate the sources of moisture, seal entry points, and use a combination of cleaning, traps, and targeted insecticides if the infestation is severe. In most cases, a DIY approach can be effective, but for large-scale infestations or hard-to-reach areas, it's best to call in a professional pest control technician.