The answer to 'why is my silverfish swarms' is that silverfish infestations are often caused by excess moisture, food sources, and lack of cleanliness in the home. Silverfish are attracted to damp environments, starchy foods, and paper products, and can quickly multiply if these conditions are present.
Common signs of a silverfish infestation include seeing the insects themselves, finding their shed exoskeletons, and noticing damage to paper products, clothing, or food packaging. Silverfish can be difficult to eliminate on your own, so it's often best to call a professional pest control technician to properly identify the problem and implement an effective treatment plan.