What Are Silverfish?

Silverfish are tiny, wingless insects that have survived for millions of years. These prehistoric bugs grow up to 1½ inches long. With flat, carrot-shaped bodies, long antennae, and silvery scales, they slither like snakes.

No, they don’t fly or bite—but they’re far from harmless.

Why Silverfish Invade Your Home

If you spot silverfish in your bathroom, kitchen, laundry room, or basement, your home may be offering them an ideal habitat.

They thrive in:

• High humidity

• Dark spaces

• Starch and sugar sources (paper, glue, fabric, and even dandruff!)

In short, your books, boxes, wallpaper glue, and old clothes are all fair game.

Are They Dangerous?

They won’t sting or spread disease, but don’t let their silence fool you. Silverfish can cause real damage over time:

• Books and paper – They eat glue and pages.

• Clothing and linens – Especially items left undisturbed.

• Wallpaper – They love the glue behind it.

• Pantry goods – Think flour, oats, and cereal.

Even worse? They breed fast. A couple of silverfish today could mean an infestation in a few months.

Signs You Have a Silverfish Problem

Aside from catching one slinking across the floor, look for:

• Yellow stains or small holes in paper or fabric

• Shedded skins in corners

• Droppings that look like tiny black pepper flakes

• Damaged wallpaper, especially at seams

If you find these signs in damp areas, you likely have silverfish.

How to Get Rid of Silverfish

1. Dry Out Your Space

Use a dehumidifier, especially in bathrooms or basements. Improve airflow and keep areas well-ventilated.

2. Remove Food Sources

Toss stacks of old papers, cardboard boxes, and dusty books. Store pantry items in sealed containers. Vacuum often.

3. Seal Entry Points

Caulk cracks and crevices around baseboards, pipes, and walls. Don’t give them places to hide.

4. Try Natural Repellents

Sprinkle diatomaceous earth or boric acid in problem areas (keep away from pets and kids). Essential oils like lavender and cedarwood can also help repel them—and freshen the air.

5. Set DIY Traps

Wrap a jar in masking tape and place a piece of bread inside. Silverfish climb in but can’t climb out.

6. Call Pest Control

If you see several silverfish, especially during the day, it’s time to bring in the pros. They’ll assess and treat the infestation thoroughly.

How to Keep Silverfish Out for Good

• Use moisture absorbers like DampRid under sinks and in closets.

• Store clothing and papers in sealed plastic containers.

• Clean regularly—no piles of cardboard, crumbs, or clothes.

• Keep your home dry, clean, and clutter-free.

If it’s dry and boring, silverfish won’t stick around.

Final Thoughts

Silverfish are gross—but beatable. They love damp places and carbs, not humans. Still, they can ruin your stuff if left unchecked.

The good news? You can get rid of them. Dry the area, clean thoroughly, seal up cracks, and take preventive steps. It worked for me—and it’ll work for you too.