The best way to avoid attracting silverfish is by reducing moisture levels. This can be done through the use of dehumidifiers and air conditioners. Fixing leaks and wiping out sinks, bathtubs, and showers can also help. It is important to eliminate possible entrances by sealing cracks in the foundation and caulking around doors, windows, and baseboards. Carefully inspect any boxes, newspapers, or packages for silverfish before bringing them inside. Since silverfish can live in so many different areas of a home or business and are active year round, they can become a problem very quickly.