They live 2-8 years. They’re eating your valuables right now. Here’s how to stop them.
Silverfish are attracted to starch, so they are drawn to starched clothing, wallpaper paste, and glue in book bindings. If you’ve discovered irregular holes in your favorite book or noticed small tears appearing in your clothing, you likely have a silverfish infestation.
The critical fact: Silverfish have a surprisingly long lifespan for an insect. On average, they can live between two to eight years, depending on environmental conditions. Their ability to survive for long periods without food makes them particularly resilient pests in homes.
This means a silverfish you’re ignoring today could be eating your valuables for the next 8 years.
Silverfish feed on a variety of starchy materials including paper, cardboard, book bindings, glue, wallpaper paste, textiles, and certain food items like grains and cereals.
Books & Documents
Book spines, pages, bindings. Often the first targets because glue is starch-based.
Clothing
Natural fibers (silk, cotton, linen). Especially starched dress clothes and stored items.
Wallpaper
The paste underneath is pure starch. They eat from behind, creating bubbling patterns.
Important Papers
Documents, certificates, photographs. Once damaged, often irreplaceable.
Pantry Items
Flour, cereal, pasta in unsealed containers. Contaminated = must be discarded.
Furniture & Antiques
Upholstery, wood with starch-based finishes. Damage can be permanent.
Look for small holes or irregular patterns on clothing. They may chew up the glue in books, meaning that the book pages may come undone and weaken over time.
If you flip on the light in your bathroom and see little gray bugs running for cover, there’s a good chance they’re silverfish. Although small in size, silverfish do chew books and other items leaving fine, tiny holes, or damaged edges.
What you’ll actually see:
Silverfish are often found in damp, humid areas such as bathrooms and kitchens. They prefer dark, undisturbed places where they often hide in cracks, crevices, and behind baseboards, wallpaper, or insulation.
Singapore’s tropical climate (70-90% humidity year-round, 27-32°C) creates perfect conditions for silverfish survival and reproduction.
This is why they’re so hard to eliminate:
Eggs laid: Female silverfish lay 20+ eggs in protected cracks and crevices
Egg to adult: Females can produce about 60 eggs during warm summer months, and lifecycle from egg to adult can be completed in less than one month.
Adult lifespan: Silverfish can live between two to eight years, depending on environmental conditions.
Total population impact: One female silverfish can produce 60+ eggs per summer, with 50% being female
The challenge: Silverfish are nocturnal which means we have lesser visibility in spotting them only at night when they are up and awake, thus pest detection is limited.
But there are telltale signs:
Irregular holes, rough edges, yellow stains, weakened bindings. Damage spreads in one area then grows as unconnected holes.
Small tears in stored clothes, natural fabrics affected more. Often discovered when retrieving seasonal items.
Tiny black pepper-like specs in drawers, near books, in corners. Hard to see but definitive sign of activity.
Silvery dust around damaged items. Their silvery scales rub off easily, leaving gray smudges.
Gray, fish-shaped insects (12-19mm) running when light is turned on. Nocturnal = seen mostly in bathrooms at night.
In severe infestations, a musty odor develops in affected areas, similar to moisture/mold smell.
The problem: You see silverfish and think “I’ll just spray them.” But here’s what actually happens:
The cost comparison: SGD $150-300 professional treatment now vs. replacing destroyed books (SGD $300-2,000+), wedding dress (SGD $500-3,000), important documents (sometimes irreplaceable).
• Airtight plastic containers for books, documents, clothing
• Zip-lock bags for important papers
• Sealed boxes with silica gel packs for seasonal items
• Remove cardboard boxes (silverfish food source)
• Install dehumidifier in affected areas
• Target humidity: 50% or below
• Improve ventilation in bathrooms, basements
• Repair water leaks immediately
• Seal pantry foods in airtight containers
• Remove old newspapers, magazines, cardboard
• Clean dust regularly (food for silverfish)
• Don’t leave books/clothes in damp corners
• Seal cracks around doors, windows, baseboards
• Caulk gaps in walls, pipes
• Fix gaps in foundation and floor
• Use weather stripping on entry doors
If you’ve already discovered damage: Professional silverfish treatment is essential. When silverfish infestations are severe, professional treatment using targeted spraying or other methods is necessary to remove all nesting sites and bring down the population level.
Initial treatment (inspection + spraying): SGD $150-300
Follow-up visit (recommended 2-3 visits): SGD $80-150 each
Total cost for full elimination: SGD $300-600
No. Silverfish do not bite humans. They lack the mouthparts needed to pierce skin or cause harm. However, they can trigger allergic reactions in some individuals due to their shed scales and droppings.
Silverfish leave irregular, unconnected holes spread across fabric. Moths create more uniform circular holes in patterns. Silverfish also leave tiny black droppings nearby.
Partial prevention is possible (removing food sources, sealing containers, improving ventilation), but a dehumidifier is the most effective tool. Use dehumidifiers to lower humidity levels, especially in basements, attics, and bathrooms.
Professional treatment shows results within 1-2 weeks. Full elimination requires 2-3 follow-up visits over 4-6 weeks due to the egg lifecycle.
Existing damage won’t reverse, but further damage stops immediately after treatment. Important: Store damaged books in sealed containers to prevent re-infestation.
Silverfish have been eating your valuables for how long now?
Every month you wait, they lay more eggs. Your collection gets damaged more.
✓ Same-day or next-day inspection available
✓ Professional assessment of damage extent
✓ Treatment plan to stop further losses
✓ Storage advice to protect remaining valuables
✓ Prevent future infestations
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