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Lemon Grove, CA

There are silverfish in the bathroom

Silverfish are a moisture signal. They are harmless, they do not bite and they carry no disease — but they only live where it is reliably damp, so finding them usually means finding a humidity or leak problem first.

Licensed California operators. No obligation for the call.

Why it will not stop on its own

They are there because the conditions are right. Bathrooms, under sinks, behind a vanity, in a cupboard against an outside wall. Somewhere in that area is holding moisture.

They eat starches — paper, cardboard, book bindings, wallpaper paste, stored fabric. Stored boxes in a damp cupboard are a food supply as well as a shelter.

Killing the ones you see changes little while the damp stays. That is the honest version, and it is why a technician who looks at ventilation before reaching for a sprayer is doing the job properly.

What the visit involves

The moisture first: under the sink, around the toilet base, the seal at the shower or bath, and whether the extractor actually moves air.

Then the harbourage — stored cardboard, paper and fabric in the damp area — and a treatment aimed at where they shelter rather than where they were seen.

What to say when you call

Which rooms, and whether it is always the same one
Whether there has been a leak, or the extractor is weak or missing
Whether anything stored there has been damaged
Whether the wall is an outside wall

Common questions

Are they dangerous? No. They do not bite and carry no disease. The damage is to paper, fabric and stored items.

Does it mean the house is dirty? No. It means somewhere is damp.

Can I just get them sprayed? You can, and they will return while the moisture does. Fixing the ventilation or the leak is what makes the treatment hold.

Describe what you have seen and where. Call to check today's availability in your ZIP code.

Related

General pest control in Lemon GrovePest control in Lemon Grove 91945

Other things people find

I found droppings in the pantryMeasure them before you clean. A quarter of an inch is a mouse, half an inch is a rat, and the two need different work.I woke up with bites in a lineBites appearing overnight in a row on exposed skin are worth checking the bed for. Bites alone never confirm what caused them.Roaches scatter when I turn on the kitchen lightSeeing roaches scatter when you turn on the light means the population is large enough to be pushed into the open. Which kind decides everything.Something has chewed through the food packagingChewed corners on boxes and bags mean an established route, not a visitor. Sealing the food does not close the way in.Something is biting my ankles indoorsBites around the ankles usually mean fleas, because fleas jump from floor level. Most of the population is in the carpet, not on the pet.Something is scratching above the ceiling at nightScratching overhead after dark in this area is usually roof rats. They arrive at the roofline, not the floor, which changes the whole search.The yard is full of mosquitoesThe mosquitoes biting in a San Diego yard breed in very small amounts of standing water, usually on the property itself.There are dark specks along the mattress seamSmall dark dots along a mattress seam, with pale shed skins nearby, are the usual first sign of bed bugs. Spraying them spreads the problem.There are mud tubes running up the foundationPencil-width mud tubes running up masonry are subterranean termites travelling from the soil to the wood. Breaking one tells you if it is active.There are tiny hard pellets on the windowsillDry six-sided pellets below wood are drywood termite frass. They live inside the timber, which is why nothing shows on the foundation.There is a pile of small wings on the windowsillSmall identical wings shed in a pile mean a termite swarm, and a swarm means a colony old enough to reproduce.There is a trail of ants across the kitchenA line of small dark ants moving both ways means a nest nearby and something feeding it. What it is and what to do about it in Lemon Grove.There is a web and a dark spider in the garageMost garage spiders are harmless. The western black widow is the one worth checking for, and it sits under an irregular tangle in a sheltered corner.There was a cockroach in the bathroom in the middle of the dayA roach out in the open during the day usually means crowding or a route in from a drain. The two have completely different answers.

Service areas

Lemon Grove 91945Spring Valley 91977La Mesa (Mount Helix) 91941La Mesa 91942San Diego (Encanto) 92114San Diego (College Area) 92115San Diego (City Heights) 92105San Diego (Paradise Hills) 92139San Diego (Logan Heights) 92113National City 91950Bonita 91902Chula Vista 91910El Cajon 92020El Cajon (East) 92021

Updated August 28, 2026

Call (888) 217-3626