Point the fan at your feet

For a patio or a bedside in an ordinary mosquito season, people say yes, and they give the mechanism. Many people say mosquitoes are weak fliers and that a fan’s airflow stops them approaching or landing; others say a fan pointed at a fixed spot keeps that spot clear; others add that the moving air also scatters the carbon dioxide and body heat that mosquitoes follow to find you, that an oscillating fan clears a whole patio, and that one person keeps chickens bite-free the same way. The placement matters, and one person makes the point that this page is titled for: a fan aimed straight at a person can push insects toward them, so aim it at the feet and let the air travel up the body, or use two fans as a barrier. People argue how far this goes, and so here are both sides and the deciders: some people say fans work on patios and for sleeping against some who still got bitten; some people say that in places where mosquitoes are dense the fan is not enough — one person from the northern lake states of the US calls fans useless there — and that a net, screens or a proper repellent are needed; people’s decider is how many mosquitoes your place has and where the fan points. The limits: a fan protects the space it reaches and no more; a bigger fan works better and is louder; and the fan is for mosquitoes, which are weak fliers — a housefly is the next question. One person rigged a trap from a fan and a square of screen, which catches what the fan pulls in; a trap that uses light and a fan, one person says, thins the local population inside a small radius. Some people also joke about ‘fan death’ and fire, which people themselves dismiss.

Turn the lights off and give it somewhere brighter to go — many people do exactly this. Switch off every light in the room, switch on a light outside it — the hall, the porch, the room next door — and open the door or window between; flying insects steer toward light, and the fly leaves on its own. It works for moths and for the mosquito you can hear but not see, and it is the only method here for an insect that is already indoors — a gap people name, since the discussion is mostly about keeping them off you outside. For houseflies that keep coming, one person uses a bottle trap and an electric swatter, and says a patch of artificial grass was drawing them; another says the real work is sealing the gaps around doors and windows and removing whatever they breed in nearby, which is the next question with the water swapped for waste. A net over a bed is mentioned by one person; window screens people do not discuss at all, and this page names both as the gap they are: one person says a bed net is the one thing that has kept them completely bite-free while sleeping, and people say little more.

Find the water. Some people say the way to end a mosquito problem rather than manage it is to remove every source of standing water they can breed in — a blocked gutter, a rain barrel, a saucer under a pot, a bucket, a tarp with a puddle in it. Others add the ones people miss: a rain barrel can be stocked with a few small fish that eat the larvae, one person says; an unsealed vent pipe on a septic tank turned out to be one person’s enormous hidden breeding ground until it was screened; a dumpster or an open bin breeds flies the way water breeds mosquitoes. One person says sealing the cracks around doors and windows did more for them than repellents, because it stopped them getting in at all. Some people add the rules of the insect itself, which shape everything else on this page: only the female mosquito bites, because she needs blood for her eggs, and she finds you by the carbon dioxide you breathe out and the smell of your feet — which is why one person aims the fan at the feet, and another says moving air blows the signal away as well as blocking the flight. Whether some people are simply more attractive to mosquitoes than others is agreed by some people and argued about in its causes; some people warn that the blood-type explanation others offer is anecdote.

The recognised repellents work and the folk ones mostly do not, and people corrected each other on this. Some people say the repellents containing the ingredient people name most — or two others on the public-health list of recognised ones — are markedly more effective than the natural alternatives; others say the same for the tropics, where one person says nothing else besides the recognised repellents and loose long sleeves does anything; this page checked that against US public-health guidance, which names those ingredients and none of the folk ones. The mistakes people caught: some people say dryer sheets rubbed on the skin repel mosquitoes, and some people say they do not, that at best they mask scent for a moment, and that a fact-checking site says so. Citronella candles, some people point out, mostly contain artificial scent and do little even when genuine — one person says a ring of many candles or the live plant does more than one candle on the table; pure citronella oil on the skin has some people behind it and this page carries it as theirs. Garlic pills make you smell of garlic and a vitamin’s effect is anecdote, people warn, one person each. On the recognised repellents people have their own cautions, which this page carries: one person warns a child who licks treated skin may have seizures, especially if prone to them; one person says the main ingredient dissolves some plastics, so keep it off a watch face or a compass; one person says heavy, repeated occupational exposure has been linked to sleep and mood effects, and one person calls it a neurotoxin — against which one person warns that the risk of the illnesses mosquitoes carry outweighs occasional use, and some people describe how serious those illnesses can be. Follow the label; this page prints no strength. The dryer-sheet argument has a second half people spend a long time on — many people say the sheets contain chemicals that irritate and may be harmful, and if you are prone to rashes or allergic to the scents, do not rub them on skin — and this page’s reading is that it is moot: they do not work, so there is no reason to wear them. One person says an essential-oil spray worked as well for them as the recognised repellents; this page carries that as theirs, against the guidance.

Cover the skin, and think about the cat before you treat the clothes. Some people say the tropical and field version is long sleeves and long trousers, loose, tucked into socks, a face net where the insects are thick, and a repellent from the recognised list on what is left exposed; some people treat clothing with a fabric insecticide called permethrin as part of a field kit. Then the hard line: one person warns that permethrin poisons cats and stays in the fabric after the first treatment, so anyone with a cat should not treat clothes at all, and one person warns that no pet should touch treated fabric while it is wet. One person warns long sleeves in heat are a drag. For sleeping, one person says a physical net is the only complete barrier they have found — better than sprays, coils or fans — and people’s own gap is that a net gets one line and window screens none, so this page names them as the gap. One person says incense coils depend on the wind carrying the smoke the right way, and the wrong wind makes them useless. What people do not cover, and this page will not invent: indoor mosquito control beyond the fan and the light trick, alternatives for people who cannot tolerate the recognised repellents, what any of it costs, and when to call a professional. Some arguments are not carried here: which regions have the worst mosquitoes, and a claim about which people they prefer, which this page does not carry.