You see one lipas dart under the fridge and it’s gone before you can move. So where are the rest? Here’s the honest version of how a technician answers that: we don’t guess — we follow the signs. A torch at a low angle, a mirror for the spots you can’t see into, a flushing agent to move them, and the droppings, egg cases and smear marks that lead straight back to where they shelter. Cockroaches hide within a few feet of food and warmth, so the search is less about luck and more about knowing the three or four places they always end up. This is what actually happens on a job.

How does a technician actually search for cockroaches?

The kit is simpler than people expect. Four things do most of the work:

• A bright torch, held low. The ceiling light flattens everything. A torch raked across a surface at a shallow angle throws shadows off droppings and catches the greasy smear marks on a runway — the stuff you walk past every day without seeing.
• A mechanic’s mirror. A small mirror on a handle to look into the voids you can’t get your head into: behind the fridge, under the kitchen cabinet, the back of the microwave motor housing, the gap behind a wall-mounted cupboard.
• A flushing agent. A light pyrethrin aerosol misted into a suspected crack. It irritates the cockroaches and they run out, which confirms the harbourage instead of guessing at it. It’s a diagnostic tool, not the treatment.
• Monitor traps. Sticky glue boards placed flush against walls and in corners, then checked over a few days. Whichever board fills fastest tells you which room and which corner is the worst — that’s where the treatment gets concentrated.

The order matters too. A technician starts where cockroaches want to be — kitchen and bathroom, warm and moist and close to food — before working outward. Ovens, kettles, the motor compartment of a fridge and the underside of a sink get checked before anyone bothers with the living room.

Where do cockroaches hide in a Malaysian home?

Two species cover almost every callout, and they hide in completely different places. Knowing which one you have tells the technician where to look.

The German cockroach (Blattella germanica) is the small brown one that nests indoors and breeds fast — one egg case carries up to 40 eggs. It wants tight, warm, moist gaps within about a metre of food. In a Malaysian kitchen that means along cabinet hinges, under and behind the fridge, inside the motor housing of the microwave, dishwasher and kettle base, under the sink, behind loose skirting, and in the gaps around pipe penetrations. It does not wander far — find the food and warmth and you’ve found the harbourage.

The American cockroach (Periplaneta americana) is the big reddish-brown one. It lives outdoors in drains, sumps, grease traps and back lanes, and comes up through the floor drain or under the kitchen door at night. If yours are large and only appear after dark, the search moves to the drains and the perimeter, not the cabinets.

One useful tell for a homeowner: if you’re seeing cockroaches in daylight, the harbourage is already too crowded and they’re being pushed out with nowhere else to go. One in the kitchen is a guest. Five is a meeting. Twenty in broad daylight and you’re hosting a conference.

“I rented an apartment beside waste chamber, for 2 years being spraying consistently but to no avail. But this service clear the root problem by give bait to main points around the house so that even the little ones baited.”

— Afiq Zamanhuri, Google review. Two years of spray missed the harbourage. Finding the main points — then baiting them — is what cleared it.

What signs point a technician to the nest?

A quick point on language: cockroaches don’t have a queen. Unlike termites or ants, they don’t run a single royal chamber — they gather in shared harbourages of nymphs and adults. So “the nest” is really the crack or void where the whole group shelters, and the way to find it is to read the mess they leave behind.

• Droppings. German cockroach droppings look like ground black pepper or coffee grounds — tiny dark specks clustered in a corner, a drawer, or along the top edge of a cabinet. The heavier the speckling, the closer the harbourage.
• Egg cases (oothecae). Brown, capsule-shaped cases about the size of a rice grain, tucked into corners and crevices near the shelter. Finding these is the difference between a few strays and an established breeding population.
• Shed skins. Cockroaches moult several times as they grow, leaving pale cast skins near where they hide.
• Smear marks and smell. Dark greasy marks along the runways they use most, and a musty, oily smell when the population is large.

The technician follows the density of these signs the way you’d follow a trail getting warmer — light speckling at the edge of the kitchen, heavier near the fridge, heaviest right at the crack behind the motor housing. That last spot is the harbourage, and that’s where the BASF Provecta gel bait goes.

Why do professionals find what homeowners miss?

It isn’t magic and it isn’t better eyesight. It’s two things: they move things, and they’ve seen it a few hundred times.

Most people inspect a kitchen standing up, with the ceiling light on, looking at the surfaces. A technician pulls the fridge out, unscrews the kick-plate under the cabinets, lifts the microwave to check the motor housing, and shines a torch into the pipe gap under the sink. German cockroaches live in exactly the spots you have to move something to see. And after enough jobs, you learn that three or four places hide the large majority of a kitchen infestation — so the search is fast and it’s targeted.

A homeowner in Setia Alam called us after a year of quarterly visits from another company — cockroaches kept coming back. One inspection turned up the German cockroach harbourage behind a microwave bracket the previous technician had never moved. One round of targeted baiting and it was gone for good. The chemical was never the problem. Nobody had actually looked.

— Job notes, Nomobug field team

This is also why gel baiting beats blanket spraying for indoor cockroaches. Once the harbourage is found, the bait goes right on the runway next to it, gets carried back, and is eaten by the rest of the group you never see. Spray a skirting board without finding the shelter and you kill the few that walk across it while the harbourage keeps producing. That’s the mechanism behind cockroaches coming back after spraying.

What does cockroach treatment cost?

Finding the harbourage is step one; treating it is priced as a general pest treatment. Rough market rates for a terrace house in the Klang Valley: