Silverfish are small, silvery, nocturnal insects that thrive in humid Chicago bathrooms, basements, and laundry rooms. They feed on starchy materials including paper, book bindings, wallpaper paste, fabric, and pantry items, and can live up to 8 years in the right conditions.
What Do Silverfish Look Like?
Silverfish are 1/2 to 3/4 inch long, flat, carrot- or teardrop-shaped, and covered in fine silvery scales that give them their name. They have two long antennae in front and three long tail-like filaments behind, and move with a distinctive wriggling fish-like motion.
Where Do Silverfish Hide?
Silverfish prefer dark, humid spaces. In Chicago they hide in bathrooms (especially around tubs and under sinks), basements, laundry rooms, behind baseboards, in stored boxes of paper, in book shelves, and inside attic insulation.
Signs of a Silverfish Infestation
Yellow stains or small irregular holes in paper, book pages, or wallpaper; tiny pepper-like droppings; shed translucent skins in humid corners; and seeing the actual silverfish darting away when you turn on a bathroom light at night.
Health Risks of Silverfish
Silverfish don't bite or carry disease — they're a nuisance pest. The damage to books, photographs, important documents, and fabrics can be significant over time, especially in Chicago basements where stored items sit for years.
How Sleep Tight Treats Silverfish in Chicago
Sleep Tight treats silverfish with crack-and-crevice residuals, dust applied to wall voids and behind baseboards, and humidity-reduction recommendations. Without addressing the moisture source, silverfish always return.
Need help with silverfish in Chicago?
Sleep Tight Pest Control offers same-day chicago general pest control across every Chicago neighborhood and suburb. Call (773) 240-5932 or get a free quote online.
Frequently Asked Questions
Why do I keep seeing silverfish in my bathroom?
Bathrooms provide the warm humid conditions silverfish need. Using an exhaust fan during showers and adding a small dehumidifier helps significantly.
Are silverfish harmful to humans?
No — they don't bite or carry disease. They are a nuisance pest that damages paper and fabric over time.
Will silverfish eat my books or photos?
Yes — silverfish feed on the starches in paper, wallpaper paste, and book bindings, and can cause noticeable damage to stored documents and photos in damp Chicago basements.
How do I stop them long-term?
Treatment plus humidity control. Sleep Tight customers who add a basement dehumidifier and seal cracks rarely see silverfish return after our treatment.