Silverfish and Clothes: How to Prevent Fabric Damage

Silverfish can cause significant damage to clothing and textiles, especially items stored in dark, humid closets and basements. Unlike clothes moths — which are perhaps more famous for fabric damage — silverfish create a different type of destruction. Here is how to identify, prevent, and address silverfish damage to your wardrobe.

Which Fabrics Silverfish Target

Silverfish feed on both natural and certain synthetic fabrics, with a strong preference for materials containing starch or cellulose.

Most Vulnerable Fabrics

• Cotton: One of the most common targets. Cotton is a cellulose fiber that silverfish readily digest.
• Linen: Made from flax fibers (cellulose), linen is equally attractive to silverfish.
• Silk: Although silk is a protein fiber rather than cellulose, silverfish feed on it, particularly the sericin coating.
• Rayon: A semi-synthetic fiber made from cellulose, rayon is vulnerable to silverfish feeding.
• Starched fabrics: Any fabric that has been starched becomes more attractive to silverfish. Professional laundering often adds starch that creates a silverfish target.

Less Vulnerable Fabrics

• Polyester: Pure polyester is not a silverfish food source. However, food stains or body oils on polyester can attract feeding.
• Nylon: Generally resistant to silverfish unless stained.
• Wool: Silverfish occasionally nibble wool, but it is less preferred than cellulose-based fabrics. Wool is more commonly damaged by clothes moths.
• Acrylic: Generally not targeted by silverfish.

How Silverfish Damage Clothing

Silverfish create distinctive damage patterns that differ from those caused by moths:

• Irregular holes: Unlike the round holes moths create, silverfish produce irregular, ragged-edged holes.
• Surface scraping: Silverfish may scrape the surface of fabric rather than eating through it completely, leaving thin, weakened patches.
• Edge feeding: Damage often appears along fabric edges, folds, and creases.
• Yellow staining: Silverfish leave yellowish stains from their scales and excrement on fabric surfaces.
• Feeding along soiled areas: Silverfish are attracted to food stains, body oils, and perspiration on clothing, so damage often concentrates around stained areas.

High-Risk Storage Situations

Your clothing is most vulnerable when:

• Stored in dark, humid closets or basements
• Packed in cardboard boxes (which attract silverfish and provide no barrier)
• Left undisturbed for long periods (off-season clothing, formal wear)
• Stored while dirty (food stains and body oils attract silverfish)
• Placed directly on closet floors or shelves without protection

How to Protect Your Clothing

Proper Storage

• Seal in containers: Store off-season clothing in sealed plastic bins or vacuum-sealed bags.
• Use garment bags: Hang important garments in zippered garment bags.
• Avoid cardboard: Never store clothing in cardboard boxes, which attract silverfish and provide easy access.
• Clean before storing: Always launder or dry-clean clothing before storing it for extended periods. Remove food stains and body oils that attract silverfish.

Closet Management

• Reduce humidity: Use a dehumidifier in closets with humidity issues, or place moisture-absorbing products (silica gel, calcium chloride packets) in the closet.
• Improve ventilation: Leave closet doors slightly open or install a ventilation system.
• Declutter: Remove items you no longer need. Less clutter means fewer hiding spots and less food.
• Use natural deterrents: Place cedar blocks, lavender sachets, or cinnamon sticks among stored clothing.

Treatment

• Apply diatomaceous earth in closet corners, along baseboards, and behind shelving (not directly on clothing).
• Place sticky traps in closet corners to monitor activity.
• Seal cracks in closet walls, floors, and around baseboards.

Dealing With Damaged Clothing

If silverfish have already damaged clothing:

1. Remove all items from the affected closet or storage area.
2. Inspect each item for damage, live silverfish, and eggs.
3. Launder or dry-clean salvageable items.
4. Discard heavily damaged items.
5. Treat the closet or storage area with DE and traps.
6. Reorganize using protective storage methods before returning items.

Silverfish vs. Moths: Telling the Damage Apart

Both silverfish and clothes moths damage stored textiles, and it helps to know which pest is responsible:

• Silverfish holes: Irregular, ragged edges. Often accompanied by surface scraping. Concentrated near stains and food residue on fabric. Yellowish staining from silverfish scales.
• Moth holes: Rounder, cleaner edges. Often found on wool, cashmere, and silk. May have silken webbing or small tube-like cases nearby from moth larvae.
• Location clues: Silverfish damage is more common on cotton and linen in humid environments. Moth damage is more common on animal-fiber fabrics (wool, silk, cashmere) regardless of humidity.

If you are finding both types of damage, you may have both pests — which is not uncommon since both favor dark, undisturbed storage areas.

For a comprehensive silverfish control plan, see our guide on how to get rid of silverfish. For an overview of all silverfish topics, visit the complete guide to silverfish.

Expert Insight

"Silverfish damage to clothing is more common than most people realize," says Sarah Mitchell, BCE. "In my 15 years of IPM experience, I have seen silverfish damage to stored wedding dresses, vintage garments, and seasonal clothing kept in damp closets or basements. The damage often looks like irregular holes or surface grazing on natural fabrics — cotton, silk, and linen are most vulnerable."

Main Causes

Silverfish target clothing primarily because of what fabrics are made of and how they are stored. Cotton, linen, and rayon are cellulose-based fibers that silverfish can digest. Silk attracts silverfish because of its sericin protein coating. Starch applied during professional laundering or ironing makes any fabric more attractive. The storage environment matters as much as the fabric type. Closets and garment storage areas that remain dark and undisturbed for months provide both shelter and a continuous feeding opportunity. Humidity above 50 percent in storage spaces accelerates the problem by supporting silverfish reproduction near the clothing. Cardboard garment boxes offer no protective barrier and themselves serve as a supplementary food source, drawing silverfish directly to stored items.

Prevention

Store all off-season clothing in sealed plastic bins or zippered garment bags. Launder or dry-clean garments before long-term storage, since food stains and body oils on fabric concentrate silverfish feeding. Avoid cardboard boxes, which attract silverfish and provide no protective barrier. Keep closet humidity below 50 percent using a small dehumidifier or moisture-absorbing packets. Place cedar blocks or lavender sachets among stored items as supplementary deterrents. Leave closet doors slightly open or install ventilation to prevent humid air from accumulating. Inspect stored clothing at least once per season, pulling items off shelves and checking for damage, shed skins, or droppings. Seal baseboards and wall gaps inside closets to remove the travel routes silverfish use to reach stored garments.

How to Identify

Confirm silverfish through direct observation in the early morning, by inspecting under sinks, behind toilets, in basements, around hot water heaters, and inside seldom-opened storage. They are flat, teardrop-shaped, silver-gray, ten to twelve millimeters long, with three tail filaments and rapid darting movement when exposed to light. Cast skins along baseboards and inside cardboard storage are common evidence. Damage to wallpaper edges, book bindings, photo albums, stored documents, and dried pantry items follows characteristic patterns — irregular surface etching and notched edges rather than holes. Sticky traps placed in corners of bathrooms, basements, and storage areas catch active adults overnight and confirm the active rooms.

Risk and Severity

Silverfish pose no direct medical threat — they do not bite, sting, transmit disease, or contaminate food in ways that produce illness. The risk is material damage. They feed on book bindings, paper documents, photographs, wallpaper paste, fabric starch, cardboard, and stored dry goods, causing irreversible damage to archived materials, family photographs, important documents, library books, and stored clothing. Heavy populations also indicate persistent moisture problems that drive secondary issues — mold growth, structural wood decay, and other moisture-loving pests like booklice and mold mites. Allergic sensitivity to silverfish scales has been documented in a small number of cases. Risk scales with the value of stored paper goods and the severity of underlying humidity issues.

Solutions and Actions

Silverfish respond to a combined moisture-control and targeted-treatment program. Address the underlying humidity problem first by running a dehumidifier in basements and storage areas to keep relative humidity below fifty percent, repairing slow leaks, improving bathroom ventilation, and resolving condensation on cold-water pipes. Apply diatomaceous earth or boric acid dust in cracks and crevices, behind baseboards, under bath fixtures, and around utility penetrations — these slow-acting desiccants work as silverfish move through treated areas. Place sticky monitor traps in active rooms to verify the population is declining. Inspect cardboard storage, dispose of damaged boxes, and switch to plastic storage bins for paper goods, books, and clothing. Treatment without humidity control consistently fails.

Frequently Asked Questions

What types of clothing do silverfish eat?

Silverfish prefer natural fabrics — cotton, linen, silk, and rayon. They are attracted to the cellulose in plant-based fibers and the proteins in animal-based fibers like silk. Synthetic fabrics are generally less attractive unless they are soiled with food stains, sweat, or body oils that silverfish can feed on.

How do I protect stored clothing from silverfish?

Store clothing in sealed plastic bins or garment bags, especially items made of natural fabrics. Keep closets dry with good ventilation or a small dehumidifier. Use cedar blocks or lavender sachets as supplementary deterrents. Avoid storing clothing in cardboard boxes, which also attract silverfish.

What does silverfish damage to clothing look like?

Silverfish damage on clothing appears as irregular holes, surface grazing, or thinned areas on the fabric. Unlike moth damage, which tends to follow the grain of the fabric, silverfish damage is more random. You may also see yellowish stains from their droppings near damaged areas.

What should I check after noticing clothes silverfish activity?

After noticing clothes silverfish activity, inspect the nearest dark cracks, baseboards, pipe openings, stored paper, and humid corners. Use a flashlight at night and place sticky traps along the route where the insect disappeared. That pattern tells you whether the issue is a single wanderer or a supported harborage with moisture and food sources that need correction.

Sources and Further Reading

• NPMA — Silverfish Overview
• Purdue Extension — Silverfish Control
• NC State Extension — Silverfish and Firebrats
• Penn State Extension — Silverfish Fact Sheet
• University of Minnesota Extension — Silverfish