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Silverfish in the Home: How a British Engineer Solved the Problem — Without a Single Chemical

By Hannah WrightLast updated: 24 June 20267 min read
Close-up of a silverfish on a bathroom tile at night
The silverfish (Lepisma saccharina) thrives in the damp corners of British bathrooms and kitchens.

It always starts the same way. You flick on the bathroom light at 2am, and something long, silver and fast darts across the tiles and disappears behind the skirting board. If you've ever felt that little shudder, you already know what a silverfish is — and you know they never seem to come alone.

For thousands of UK households it's a quiet, embarrassing battle that drags on for years. And according to a growing number of experts, almost everything people are told to do about it is wrong.

Why it matters: A single female silverfish can lay up to 100 eggs. By the time you spot one in the open, there's usually a well-established population living in the damp, dark gaps you never look at — behind tiles, under the bath, inside kitchen units.
People assume silverfish are a sign of a dirty home. They're not. It's a structural problem — moisture, warmth and tiny hiding places. You can scrub a house spotless and still have them. — Dr. Sarah Whitfield, entomologist, University of Leeds

Why the usual methods fail — and quietly drain your wallet

Karen Willis, a 42-year-old from Nottingham, reckons she spent more than £400 over two years trying to get rid of them. "Traps, sprays, gels, little plug-in gadgets, essential oils — you name it, I bought it," she says. "It worked for a week, then they were back like nothing happened."

Her experience lines up with what specialists have been saying for a while. Most shop-bought solutions treat the symptom, not the source. Sticky traps catch the handful of insects out in the open while two hundred more breed behind the walls. Chemical sprays are unpleasant around children and pets, and silverfish quickly build a resistance to them. And the home remedies — lavender, lemon peel, cloves — might smell lovely, but they don't touch a real infestation.

Most of what's sold for silverfish is, frankly, a waste of money. It gives people the feeling of doing something while the actual colony is left untouched. — Dr. Sarah Whitfield, University of Leeds

The Sheffield engineer who got fed up and built his own solution

British engineer David Hart with the device he built
David Hart, a retired electrical engineer from Sheffield, with the device he built on his own workbench.

David Hart never set out to launch a product. A retired electrical engineer from Sheffield, he simply got tired of watching his wife refuse to go into their own bathroom at night.

"I'm an engineer. If something's broken, I want to understand why," he says. So he did what engineers do — he went to the research. What caught his attention was a body of work on how certain high-frequency ultrasonic pulses interfere with the way small insects sense and navigate their surroundings.

Working at his own bench, David built a compact plug-in unit that emits a continuous, precisely-tuned ultrasonic signal — completely inaudible to people and pets, but deeply disruptive to silverfish and other crawling insects. He tested it in his own home first. The result, in his words: "After about three weeks, we simply stopped seeing them." No spraying, no dead insects to clean up — just a quiet device left plugged into the wall, working around the clock.

That device became BugShield, and you can see the technology and current availability on the official Domivelo store here.

How the ultrasonic technology actually works

The BugShield ultrasonic plug-in device
BugShield is compact, silent and simply plugs into any wall socket.

BugShield emits patented ultrasonic sine-wave pulses in the 30–50 kHz range. Humans can't hear it and it's harmless to mammals, but for silverfish it scrambles the signals they rely on to orient themselves and feed. The treated area quickly becomes somewhere they instinctively avoid, so existing populations move out and die off.

Because it works on their senses rather than with poison, insects can't build a resistance to it the way they do with sprays. It draws about as little power as a small LED night-light, needs no refills or maintenance, and is completely safe to leave running around children and pets. You plug it in, and you leave it.

What UK customers are saying

★★★★★
4.9 out of 5 stars (2,864 reviews)
I was so sceptical — I genuinely thought it was another gimmick. Two weeks later I realised I hadn't seen a single one. After years of this, I could have cried. It just… works. — Emma T., Manchester
Eight months on and they're completely gone. Our flat is an older build and the bathroom was the worst. One unit in there, a second in the kitchen. My partner had honestly been talking about moving out over them. — James P., Leeds
With a cat in the house I refused to use poison sprays. This was exactly what I wanted — nothing to breathe in, nothing for her to lick. Silent, safe, and the silverfish are just gone. — Margaret H., Bristol
I was convinced it wouldn't do a thing. Bought it mostly to prove a point. Two to four weeks later the point was well and truly proven — I'm genuinely surprised at how well it worked. — Paul R., Birmingham
Bathroom corner before and after BugShield BeforeAfter
A typical result: the same bathroom corner before, and three weeks after plugging in BugShield.

Where can I get the genuine BugShield?

To be sure you're getting the genuine BugShield — with the full 2-year manufacturer guarantee and the 90-day money-back guarantee — order directly from the official Domivelo store. It's the one place that stocks the original device, so buying there is the simplest way to know you're getting the real thing, the correct technology and the support that comes with it.

Last chance: 50% off — today only
£99.98
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Why is BugShield so often sold out?

Because each unit is made and quality-checked in small batches here in Britain rather than mass-produced overseas, stock is limited. BugShield has already sold out several times this year, with some customers waiting weeks for the next run. It's in stock right now — but during the last 50% promotion the full allocation was gone within hours, and once this batch sells out the price returns to the regular £99.98.

The bottom line

You've two choices. You can keep sharing your home with silverfish and keep spending on sprays and traps that don't hold — or you can plug in a small, silent device that's already worked for more than 15,000 UK households, with 94% reporting they were free of silverfish within about three weeks. With a 90-day money-back guarantee, the only thing you're really risking is finally being rid of them.

Get BugShield — 50% Off Today →

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25 Comments

Sarah B.
Honestly thought this was too good to be true, but I'm three weeks in and the kitchen is clear. Wish I'd found it years ago.
👍 142 · Reply · 2d ago
BS
BugShield ✓ Official
Delighted to hear it, Sarah — thanks for coming back to let us know! 🙌
👍 24 · Reply · 2d ago
Claire D.
Same here — three weeks and they were gone. Still can't quite believe it.
👍 31 · Reply · 1d ago
Peter M.
Does it actually do anything for the bedroom? That's where I see them at night.
👍 38 · Reply · 4d ago
BS
BugShield ✓ Official
Hi Peter — yes. One unit covers a room up to roughly 10 metres. For a bedroom and bathroom side by side, most people use one in each. 🙂
👍 19 · Reply · 4d ago
Rachel F.
We've a dog and I was a bit worried about the ultrasound. Anyone know if it bothers pets?
👍 96 · Reply · 5d ago
Dr. Kevin B. Vet
Vet here — this frequency range is well above what cats and dogs react to. Perfectly safe for mammals.
👍 58 · Reply · 5d ago
Rachel F.
Thanks, that's really reassuring 🙏 ordered one just now.
👍 12 · Reply · 5d ago
Tom C.
Older house, damp bathroom, worst spot for them. Bought two. A month on and I'm genuinely surprised.
👍 74 · Reply · 6d ago
Louise N.
How long before you noticed a difference?
👍 8 · Reply · 6d ago
Tom C.
About a fortnight for me. Fewer and fewer, then none.
👍 15 · Reply · 5d ago
Louise N.
Just a heads up — order from the official site so you know you're getting the genuine device with the guarantee. So glad I did.
👍 118 · Reply · 1w ago
BS
BugShield ✓ Official
Thanks Louise — ordering from the official store is the best way to be sure you've got the original and full support. 🙂
👍 27 · Reply · 1w ago
Gemma O.
Two weeks in and I've not seen one. After years of this — I'm thrilled.
👍 87 · Reply · 1w ago
BS
BugShield ✓ Official
Brilliant, Gemma — thank you for sharing! 🙌
👍 14 · Reply · 1w ago
Gary H.
Sceptic here. Bought it mainly to prove my wife wrong. Turns out she was right. 😅
👍 64 · Reply · 1w ago
Fiona L.
Ha! Exact same story in our house.
👍 22 · Reply · 6d ago
BS
BugShield ✓ Official
😄 Glad it won you over, Gary!
👍 9 · Reply · 6d ago
Denise K.
Cat owner here, no poison sprays for me. This is exactly what I was after — safe and silent.
👍 52 · Reply · 1w ago
BS
BugShield ✓ Official
That's exactly why David built it. 🐱 Thanks, Denise!
👍 11 · Reply · 1w ago
Craig K.
Kitchen and utility were crawling with them. A month on, spotless.
👍 41 · Reply · 1w ago
Abbie M.
Did you need one for each room?
👍 6 · Reply · 6d ago
Craig K.
One in each, yeah. Well worth it for the peace of mind.
👍 13 · Reply · 5d ago
Pauline D.
My mother swears by hers now too. Ordered a second one for her place.
👍 29 · Reply · 2w ago
BS
BugShield ✓ Official
Lovely to hear, Pauline — thank you! 💚
👍 7 · Reply · 2w ago

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