Picture waking up one day to discover small, shiny insects infesting your bathroom or kitchen at night. You may brush it off as harmless insects. But those unwanted little critters silverfish can do damage silently that hurts your wallet and your mind. You've seen signs of silverfish infestation such as small holes in your books, yellow stains on your wallpaper, or ruined clothes, haven't you? If you do, thinking that the issue will disappear by itself will not make it disappear. It will worsen.