You have emptied the cupboards and scrubbed the worktop, yet the cockroaches come back every evening near the fridge. In many of the homes we inspect, the answer is not in the cupboards but behind or under the appliances: in the motor compartment, under the dishwasher kickboard, inside the base of a coffee machine.
These hiding places offer everything a cockroach looks for, especially German and brown-banded cockroaches: gentle, steady warmth, darkness, narrow gaps and often a little moisture. They also escape both the eye and the daily clean.
Why motors attract cockroaches
Cockroaches are cold-blooded: how active they are and how fast they breed depends on the surrounding temperature. An appliance that runs continuously or in regular cycles gives them a stable shelter, even when the home cools down at night.
Three common kitchen factors add to this:
- water: the fridge defrost tray, condensation, dishwasher seals, the coffee machine tank;
- food: crumbs that slip under appliances, coffee grounds, grease on the back of a hob;
- gaps: ventilation grilles, cable entries, insulation, circuit boards, where a flattened cockroach slips in easily.
Appliances to inspect first
From our call-outs, these are the spots where signs most often cluster.
| Appliance | Area to check | Typical signs |
|---|---|---|
| Fridge, freezer | Motor compartment at the back, defrost tray, bottom grille | Small black droppings, shed skins, musty smell |
| Dishwasher | Front kickboard, under the tub, where the hoses pass | Insects running when the kickboard comes off |
| Oven, cooker, microwave | Back and underside, ventilation slots | Black specks on warm panels |
| Coffee machine, kettle, toaster | Base, drip tray, water tank | Live insects when switched on in the morning |
| Internet router, TV box, power strip | Air vents, underside of the casing | Droppings around the vents, shed skins |
| Washing machine, dryer | Back panel, filter flap | Usually once an infestation has already spread |
Checking for yourself, safely
A short inspection will tell you whether an appliance is involved, as long as you stay careful.
- Unplug the appliance before moving it or removing a kickboard. For a fridge, a few minutes off is enough for the check.
- Shine a light at a low angle with an LED inspection torch: droppings, small black dots like ground pepper, show up better in raking light.
- Set a sticky monitoring trap on the floor against the appliance and check it after two or three nights. Our article on reading monitoring traps explains how to interpret the catches.
- Write down what you see and take photos: the technician will use them.
What not to do
Some understandable reactions make things worse or create a hazard.
- Spraying insecticide into an electrical appliance: a risk for the device and for you, and often of little use. Cockroaches flee to neighbouring areas and the source spreads out.
- Opening a sealed appliance to clean it: besides the electrical risk, you may lose the benefit of the manufacturer's after-sales service. Let the technician decide what can be treated from the outside.
- Throwing the appliance out in a hurry: an infested appliance left in the common areas or passed on to a neighbour moves the problem with it. If a replacement is on the cards, talk to your technician first.
- Putting small electronic devices in the freezer: condensation as they warm up can damage them.
What the technician does
The Repère Protocol applies here as everywhere else, with a few steps specific to appliances.
- Locate: pulling out built-in appliances where possible, torch-in-hand inspection of motor compartments, kickboards and cable routes, monitoring traps to map the sources.
- Treat: gel bait placed in dots around the appliances, in nearby cracks and hinges, never on electrical components. A growth regulator may be added where relevant. Any spraying stays localised and away from electronics.
- Check: a follow-up visit built into the protocol, a reading of the traps, fresh gel dots if activity remains.
- Prevent: photo report, targeted cleaning advice (under appliances, the defrost tray, the coffee machine base), sealing around pipe entries, active vigilance.
In a shop or restaurant, professional equipment (refrigerated counters, hood-type dishwashers, ovens) is handled the same way, ideally outside opening hours. Regular follow-up can be arranged through a vigilance contract.
Calling in a technician
Our cockroach control service includes the inspection of kitchen appliances, and the targeted German cockroach treatment covers the most frequent cases. Prices are public on the rates page and online booking offers two-hour slots.
FAQ
Can cockroaches damage an electrical appliance?
Their presence inside a device is never harmless: droppings, shed skins and dead insects build up on circuit boards and in the vents, which can hamper cooling or encourage faults. That is one more reason to treat the area around the appliance without delay.
Do you have to throw away a fridge infested with cockroaches?
Rarely. In most cases, treating the area around the appliance and a targeted clean of the motor compartment are enough to bring activity down. A replacement is something to discuss with the technician, not least to avoid moving the infestation elsewhere.
Why do cockroaches show up near the coffee machine in the morning?
The machine stays warm, its drip tray and tank provide water, and coffee grounds attract insects. When it is switched on, the heat and vibration drive out the insects hiding in the base. Repeated catches at that spot point to a source close by.
We find the source before we treat.
Locate, treat, check, prevent: the Repère Protocol applied to your home or your business, anywhere in Île-de-France.