How to Get Rid of Silverfish in Your Orange County Home
Silverfish are unsettling to find, but the good news is they are not dangerous and they are very treatable. To get rid of them, you dry out the damp spots they need, clear away the paper and starches they feed on, and seal the gaps they slip through. If they keep coming back, that almost always means there is still moisture or a hidden food source feeding them, which is where a recurring pest prevention plan earns its keep.
These little silver, teardrop-shaped insects move in a quick wriggle, almost like a fish, which is how they got the name. You usually spot them in the bathroom, a closet, the garage, or a stack of old papers. Here is how to clear them out and keep them gone.
What attracts silverfish in the first place
Silverfish want two things: humidity and starch. They thrive in spots that stay above 75 percent humidity, and they feed on the starchy, sugary material in everyday household items. Common silverfish food includes paper, books, cardboard, and wallpaper paste; dry pantry goods like flour, oats, and cereal; glue in book bindings and box seams; dead skin cells, hair, and dust; and cotton, linen, and other natural fibers.
In our part of Southern California, the damp culprits are usually bathrooms without good ventilation, the cabinet under a leaky sink, and garages that hold humidity. Find the moisture and you have found the reason they are there.
Step 1: Dry out the damp spots
This is the single most important step. Silverfish cannot survive long in a dry environment. Run the bathroom fan during and after showers, fix any slow leaks under sinks, and consider a small dehumidifier in a damp garage or laundry room. Wipe down condensation and make sure water is not pooling anywhere it should not. Take away the humidity and you take away their home.
Step 2: Clear out their food sources
Move dry pantry items into sealed glass or plastic containers instead of cardboard boxes and paper bags. Recycle old newspapers, magazines, and cardboard you have been hanging onto in the garage. Store important documents and keepsakes in sealed plastic bins rather than cardboard. The less paper and exposed starch sitting around, the less reason silverfish have to stick around.
Step 3: Seal up their entry points and hiding spots
Silverfish squeeze through small cracks and gaps. Seal openings around baseboards, pipes, and window frames with caulk. Patch gaps where utility lines enter the wall. This both keeps new ones out and removes the tight, dark crevices they like to hide in during the day.
Step 4: Treat the areas where they travel
Cleaning and drying handles the conditions, but if you already have a population, you need to treat where they live and move. This is the point where store-bought sprays tend to fall short, because they hit the silverfish you can see and miss the ones tucked deep in wall voids, attic insulation, and behind cabinets. A professional treatment targets those harborage areas directly. We apply targeted, responsible treatments in the spots silverfish actually shelter, then follow up to catch any that hatch afterward, since eggs laid in hidden cracks can keep the cycle going if they are left alone.
Are silverfish a sign of a bigger problem?
Often, yes, and it is worth paying attention to. A silverfish problem usually points to a moisture issue, and that same moisture can invite other pests and even lead to mold over time. Damp conditions that draw silverfish can also attract cockroaches and, in some homes, give rodents a comfortable place to settle. If you are dealing with more than one kind of pest, our full range of pest control services covers them under one plan, and our rodent control team can check for the entry points that often come with a damp garage or crawlspace.
Keeping silverfish gone for good
Silverfish are persistent because the conditions that attract them tend to come back. Controlling humidity and clutter goes a long way, but ongoing prevention is what keeps a one-time fix from turning into a yearly headache. Our prevention plans treat the interior and exterior on a recurring schedule, include silverfish along with ants, spiders, and other common household pests, and come with free retreatments between visits. No long-term contract, and a full refund on your first visit if you are not satisfied.
If silverfish have taken over a bathroom or closet, call us at (949) 943-5000 and we will put together a plan for your home.
Frequently asked questions
Are silverfish harmful to humans? No. Silverfish do not bite, sting, or carry disease. They can damage books, papers, clothing, and stored food, and they are a sign of excess moisture, but they are not a health threat to people or pets.
What is the fastest way to get rid of silverfish? Drying out the damp areas they need is the fastest lasting fix, paired with removing their paper and starch food sources. For an active infestation, a targeted professional treatment clears the hidden ones that drying alone will not reach.
Why do I suddenly have silverfish? A sudden appearance usually traces back to a new source of moisture or humidity, such as a developing leak, a rainy stretch, or poor ventilation in a bathroom or garage. Brought-in boxes and old paper can also introduce them.
Do silverfish mean my house is dirty? Not at all. Silverfish are drawn to moisture, not mess. Spotless homes get them too if there is a damp bathroom, a leaky pipe, or stored paper for them to feed on.
Will silverfish go away on their own? Rarely. As long as the humidity and food sources remain, they will keep breeding. Removing the conditions, or treating the population directly, is what makes them leave for good.
