Silverfish can be a pesky surprise in your bathroom or during a relaxing bath. Fortunately, they're not too difficult to eliminate.

In areas recently affected by heavy rain, like San Francisco, these pests tend to thrive due to their love for dark and damp environments such as basements and bathrooms.

Once you notice signs of silverfish, follow these five steps to eliminate them and protect your belongings, such as clothing and books.

Quick Methods to Remove Silverfish

Just like with mice infestations, spotting one silverfish likely means there are more hiding nearby. Pest control expert Matt Smith advises taking action immediately, as these creatures prefer dark hiding spots and avoid light.

Outdoors, silverfish reside under tree bark in damp, dark places. They're nocturnal and can enter homes through small cracks and pipes.

While cleaning and organizing can help prevent silverfish, consider trying these straightforward options right away.

1. Employ Silverfish Baits and Sprays

According to pest control specialist Matt Smith, using baits in combination with sprays is the quickest way to tackle silverfish. Baits containing Borax, along with targeted sprays, effectively reduce their numbers.

For rapid results, purchase silverfish baits on Amazon and silverfish sprays at Walmart. Sprinkling Borax or diatomaceous earth from Walmart in the affected areas can also be beneficial. Additionally, consider making a newspaper trap for silverfish.

Pest control expert
Matt Smith

With 14 years in pest control, Matt Smith founded his own company nine years ago, gaining extensive knowledge of various pests and infestation solutions.

2. Use Lavender as a Deterrent

Lavender flowers

For those preferring natural methods, try adding lavender essential oil from Amazon to cleaning solutions or soak cotton balls to place in areas where silverfish appear.

Lavender sachets are another option, though they may not be as effective in damp spaces. Silverfish also dislike citrus scents and cedar, so lemon juice and cedar oil can be effective alternatives that freshen your home.

3. Incorporate a Dehumidifier

Utilizing a high-quality dehumidifier can help eliminate moisture, reducing mold and mildew while also deterring silverfish. Smith notes that these pests thrive in humid conditions, so a dehumidifier is essential.

4. Maintain Cleanliness

Clean bathroom

Silverfish are common, so there's no shame in dealing with them. Implementing daily cleaning routines in areas like your bathroom, basement, or attic can significantly lessen the chances of a silverfish infestation. Cleaning expert Paulo Filho emphasizes that consistent cleaning minimizes the risk of these pests.

If the infestation worsens, consulting a professional pest control service is advisable for complete removal.

5. Ensure Proper Ventilation

Ventilated bathroom

To deter silverfish, keep spaces well-ventilated by opening windows to allow natural light in. After showers or baths, leave doors or windows open to enhance airflow and prevent moisture buildup that can lead to mold. Avoid leaving damp towels in areas where they can't dry out.

Fixing leaks and decluttering can also help further deter these pests.

Common Questions

Are Silverfish Dangerous?

Seeing a silverfish in your home isn't a cause for alarm – they don't bite. However, they can contaminate your food if they invade your kitchen.

Why Are Silverfish in My Home?

Silverfish enter homes seeking food and shelter. They consume a variety of items, especially fibrous materials like pasta, books, and textiles. They prefer dark, moist corners for laying their eggs.

How Do Silverfish Enter a House?

They typically come from dark, humid areas like basements, moving through cracks and pipes in search of moisture and food, explains entomologist Jim McHale. He recommends targeted treatments for cracks and crevices, along with barriers at potential entry points.

Will Silverfish Damage My Belongings?

Silverfish are attracted to starch, making them a threat to books, papers, and clothing. They can cause significant damage, leading to costly replacements.

What Do Silverfish Consume?

These pests are known for their varied diet, favoring starches and fatty foods, and can even damage clothes, book bindings, and carpets.


While silverfish pose no direct threat to humans, they are unwelcome in living spaces, especially as they can damage belongings. Spotting one may indicate moisture issues, so improving ventilation and using a dehumidifier can prevent future infestations.