Nearly everyone who rings us about fleas has already tried something from a shop. Often it seemed to work for a week. Here is what those products do well, what they cannot do, and why the fleas come back afterwards.
A flea bomb, or fogger, releases a mist that hangs in the room and then falls. Wherever it lands — the top of the carpet, the middle of the floor, the seat of the sofa — it will kill adult fleas it touches. That is why the first few days after one can look like a success.
The trouble is where it does not land. A falling mist does not go sideways under the sofa, behind the television unit, beneath the bed or along the gap between carpet and skirting board. Those are the dark, sheltered places where larvae live, and they are left untouched.
Most of an infestation at any moment is not the adult fleas you can see. It is eggs, larvae and pupae in the home. The pupa sits inside a silk cocoon that resists insecticide, and it can wait for weeks before it hatches.
So a bomb or a can of spray kills the adults that are out, the house goes quiet, and then the next wave emerges from cocoons that were never affected. People reasonably conclude the product failed, buy another, and go round the same loop again.
The one thing to understand: a product that kills adult fleas on contact is not treating the problem, only the part of it that happens to be awake. Anything that works has to stay active on the surfaces while the cocoons hatch.
None of this means doing things yourself is pointless. Several things help a great deal, and we ask people to do them whether or not we treat the house.
A household spray used carefully under furniture and along edges will do more than a bomb, but it still will not touch the cocoons. The live comparison of DIY and professional treatment covers the general point.
Tell us the product and the date. It affects what we apply and when, and some products left recently on a surface are worth knowing about before anything else goes down. Do not set off another bomb in the days before our visit.
Foggers need every flame and pilot light out, smoke alarms considered, and fish tanks covered and pumps switched off. If one has been set off with a tank or a bird in the room, tell us and speak to your vet.
We apply a residual insecticide by hand to carpets, floors, soft furnishings and pet areas, working into the edges and under the furniture a mist never reaches, usually with an insect growth regulator that stops larvae becoming adults. It stays active while the pupae hatch over the following weeks, which is the gap a shop product leaves. In Crowthorne, as elsewhere, it is a fixed £220 that is confirmed before anything is booked.
Probably not. It did what it can do, which is kill adults on top surfaces. The cocoons and the larvae under furniture were never reached. Why flea infestations come back covers the other causes.
Vacuuming daily is more useful. If you do spray, tell us what and when so we can plan around it.
Having used a bomb does not make it harder. You will still see fleas for a few weeks afterwards as the cocoons hatch; that is expected.
It can. Wildlife in woods and gardens carries fleas, and a dog or cat that roams can bring them in. That is one reason to keep the animal's vet treatment up all year.
Twenty Berkshire towns, each with its own page written for that place.
Flea treatment is a fixed £220, confirmed with you before anything is booked. Tell us which rooms the pets use, whether anyone is being bitten, and whether the animals have had a flea treatment from the vet, and we will come back to you.
Tell us what you have already used, and when. It matters for the treatment and there is no judgement in the question.