Most Newton homeowners encounter silverfish in basements or bathrooms. They’re secretive, nocturnal, and good at staying hidden — until the population gets large enough to start showing up regularly.

Silverfish are wingless, nocturnal insects with a distinctive teardrop shape and a silver-gray color that shifts as they move — the “fish” in the name comes from the way they wiggle when they run. They’re fast, they’re secretive, and they feed on the starches, papers, and fabrics you store in lower levels of your home. A small infestation can cause real damage over time if it isn’t addressed.

Signs of a Silverfish Infestation

Silverfish are good at staying out of sight. By the time you’re seeing them regularly, the population has usually been established for a while. Watch for these indicators:

  • Visible insects: Silverfish spotted in bathrooms, basements, laundry rooms, or closets — especially at night or when you turn on a light.
  • Irregular feeding damage: Small, irregular holes or notched edges on paper, books, cardboard boxes, or fabric. Silverfish scrape the surface of materials rather than chewing through cleanly.
  • Yellow staining: Yellowish stains on paper or fabric near feeding sites. This is a combination of their waste and the damage caused by their feeding.
  • Shed skins: Silverfish molt throughout their lives. Small, papery shed skins in basement corners, under appliances, or in dark storage areas are a reliable sign.
  • Fecal pellets: Tiny black pepper-like droppings near harborage areas — similar in size to those of other small insects but often found concentrated in corners and along walls.

Why Silverfish Are Common in Newton

Iowa’s climate is ideal for silverfish. Humid summers push moisture into basements and crawl spaces, and Newton’s older housing stock often has less-than-perfect ventilation. Silverfish need moisture to thrive — they’ll die in consistently dry environments. But in a Newton basement in July, they’re perfectly comfortable. They also gravitate toward stored paper goods, cardboard boxes, and clothing — things most homeowners store in lower levels. Once established, they can spread to upper floors through wall voids and plumbing chases.

Our Silverfish Control Process

Miller Pest Solutions uses residual insecticide treatments in the areas silverfish are most active — typically basements, bathrooms, and storage areas. We apply product along baseboards, into wall voids through switch plates and outlets, and in other harborage zones. Gel bait is placed in spots where liquid treatment isn’t ideal. We also discuss dehumidification and storage adjustments with you — because killing the current population without addressing the underlying moisture will just invite the next one.

Why Choose Miller Pest Solutions

We’ve been doing this since 2001. QualityPro certified, NPMA members, and personally invested in the work — Joel Miller has been in pest control since 2007 and built this company around doing the job right. We give you straight answers, honest bids, and treatments that actually work. No gimmicks, no unnecessary upsells.

Get a Free Phone Bid Today

Silverfish don’t go away on their own — they just spread. If you’re seeing them in your Newton home, call Miller Pest Solutions at (515) 329-8801 for a free phone bid. We’ll tell you what we think is going on, what treatment would look like, and what it costs — no obligation. You can also visit us at millerthekiller.com.