Somebody in the family reads that heat kills bed bugs, and by that evening there is a plan involving the water heater, a hair dryer and possibly the car parked in the sun. The reading is not wrong. Heat is the only method that reliably kills bed bug eggs as well as adults, and it does it without a single drop of chemical. The problem is the gap between the biology and the plumbing — killing a bed bug egg needs about 48°C held for an hour and a half in the middle of a mattress, not on its surface, and getting there needs equipment that almost nobody in this country owns. This is what the temperatures actually are, why heat treatment never took hold in Malaysia, which parts of it you can genuinely do tonight for free, and what clears pepijat here instead.

Does heat treatment actually kill bed bugs?

Yes, and it is the one method with no argument attached. Bed bugs have no defence against heat at any life stage. The published thresholds, which are temperature and time together rather than a number on its own:

That last row is the whole engineering problem in one line. Bed bugs do not sit in the open waiting to be warmed. They are inside the mattress piping, in the headboard joint, under the skirting, behind the socket plate. Heating the air to 48°C leaves the core of a stuffed mattress sitting comfortably below it for hours, and a bed bug three centimetres inside a headboard survives a room that felt like an oven to the person standing in it. Operators overseas run heat at 60°C or so with wireless sensors placed at the coldest points, and they are watching the sensors, not the thermostat.

Temperature is not the same as heat. A hot room and a treated room are different things. What kills bed bugs is the temperature in the crack they are sitting in, held there long enough — which is exactly the measurement a hair dryer, a space heater and a closed car cannot give you.

Why doesn’t anyone offer it in Malaysia?

Four reasons, and none of them are about whether it works.

• Power. A whole-room electric heat rig draws far more than a normal Malaysian home supplies. A terrace house or an apartment running off a standard single-phase board cannot feed it, so the operator has to bring a generator, which turns a treatment into an operation.
• Equipment cost. The heaters, ducting, high-temperature fans and sensor kit are imported, and the machine has to earn back its price in a market where the alternative treatment costs a fraction as much. The arithmetic does not close.
• Buildings. Most bed bug jobs here are in strata — condominiums, apartments, serviced units. Management is not approving a day-long high-heat operation with cables running through a corridor, and the neighbouring units share the walls that the bugs also use.
• Price. Where it is offered abroad, whole-home heat treatment runs the equivalent of roughly RM8,000 to RM17,000. Against a Malaysian multi-visit programme at RM2,000 to RM2,500, there is no version of that conversation that ends in a booking.

So when a company here advertises “heat treatment”, read the scope carefully. Usually it means steam applied to the mattress and frame as one step inside a normal treatment — which is a legitimate and useful thing — rather than a sealed room held at 60°C for eight hours. Both are called heat. Only one of them is a standalone treatment, and it is not the one being sold.

And to be plain about our own scope: Nomobug does not offer heat treatment. No whole-room heat rig, and no steam sold as a treatment on its own. If heat is specifically what you want, we are not your company and we would rather tell you that on this page than after you have paid a deposit. What we do is the residual programme described below, which is what clears bed bugs in Malaysian homes.

Heat or chemical — which is right for you?

The honest answer is that they fail in opposite directions, and knowing which failure you are exposed to matters more than picking a winner.

The reintroduction problem is the one people underestimate. Heat leaves nothing behind, so the instant the room cools it is exactly as vulnerable as it was the day before. One fertilised female riding back in on the suitcase you took to the hotel, or walking through from a neighbouring unit that was never treated, and the whole thing restarts. That is why serious heat operators abroad still lay down a residual product at the edges afterwards. Heat is a reset button, not a shield.

A tenant in Kajang had spent about RM600 across two visits from a company that steamed the mattress each time and left. Both times the bugs were gone for roughly a week and back by the tenth day, which told us the story before we opened anything — the steam had cleared what it touched and never reached the eggs in the bed frame joints and the skirting behind the headboard. We ran the full programme, three visits over two weeks, and the second visit was where most of the hatchlings turned up. Third visit was clean. The steaming was not a scam. It was just half a job sold as a whole one.

— Job notes, Nomobug field team

What does the standard Malaysian treatment look like?

A programme built around the egg cycle rather than a single dramatic event.

The species here is the tropical bed bug, Cimex hemipterus, not the temperate Cimex lectularius most overseas guides describe. In our heat its eggs hatch in about 6 to 10 days, faster than the timelines quoted in British or American articles, which is precisely why the follow-up visits have to be tighter here than the schedules those articles recommend.

A proper job runs like this: inspect and confirm the harbourages, prepare (strip the bed, hot-wash and hot-dry all linens, declutter so every crack can be reached), then a residual insecticide applied as a crack-and-crevice treatment into seams, frame joints, headboard, skirting and furniture — never a gel bait, which does nothing at all to bed bugs. Then the follow-ups, timed to catch each wave of newly hatched nymphs before they are old enough to breed.

Nomobug treats bed bugs as a 3-visit programme over about two weeks, using HACCP-certified products from the BASF Provecta range, backed by a 1-year warranty — free re-service if they come back within the year, not a refund. The full walkthrough is in what to expect from bed bug treatment, and the diagnosis side is in how to get rid of bed bugs in Malaysia.

What heat can you use at home tonight?

You cannot heat a room. You can absolutely heat items, and this part is free and genuinely effective.

• Tumble dryer, high setting, 30 minutes. The single most useful thing in this article. It kills every stage including eggs, and it works on dry items straight out of the wardrobe — they do not have to be washed first. Bedding, clothing, curtains, soft toys, backpacks, the fabric bag you took to the hotel.
• Hot wash first if the item is dirty anyway, then the dryer. The dryer is doing the killing; the wash is doing the laundry.
• Bag the treated items in a sealed plastic bag straight out of the dryer, and keep them sealed until the programme finishes. Clean laundry returned to an untreated wardrobe is just laundry with a commute.
• Anything that cannot go in a dryer — shoes, hard-shell luggage, books — seal it in a bag and set it aside for the technician rather than improvising.

What does not work, and we get asked all of these: leaving the room air-conditioner off to “cook” the bugs, a hair dryer along the mattress seam, an iron over the piping, and the one that keeps coming back — a black bag in a car parked in the sun. That last one gets close to lethal temperatures on a genuinely hot afternoon and misses on a cloudy one, you have no way to verify which day you got, and you have now driven your bed bugs around town. Not a method.

Does steam count as heat treatment?

Partly, and it is worth being precise because this is where most of the confusion in the Malaysian market lives.

Steam delivers lethal heat exactly where it touches. Run slowly along a mattress seam, along sofa piping, into a bed frame joint, it kills on contact — adults, nymphs and eggs. That is real. What it cannot do is go any further than the surface it is applied to. It does not enter a wall void, it does not travel behind skirting, it does not reach the harbourage behind a socket plate, and it leaves no residue, so anything that was two centimetres deeper is unaffected and unbothered.

There is also a specifically tropical downside: soaking upholstery in a humid climate. A mattress that never fully dries is a mould problem replacing a bed bug problem, which is a poor trade. Used properly, steam is a good supporting tool inside a proper treatment. Sold on its own, at RM300 a visit, it is the thing our Kajang tenant paid for twice.

What does it cost?