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Roaches in the Microwave, Coffee Maker or Dishwasher? What to Do
Family-run, licensed and insured pest control in South Florida.
$50 OFF your first service + FREE inspectionNew customers · No code needed · No expirationSeeing roaches in the microwave, or one walking out of the coffee maker at 6 a.m., is one of the worst ways to start a day. It's also a strong clue about what you're dealing with. Roaches living inside appliances are almost always German roaches, the small, light-brown kind that breeds indoors, and they're there because the appliance gives them warmth, food and a tight place to hide. The appliance isn't the whole problem. It's one hiding spot in a kitchen that has others.
Why German roaches move into appliances
Appliances check every box for a German roach: warmth from the motor and electronics, crumbs and grease, and tight spaces close to food and water. The gap behind a microwave's control panel, the base of a coffee maker, the door seal on a dishwasher and the motor area under a fridge are all places they gather. If you're seeing them in one appliance, they're usually in the cabinets and wall voids around it too. Our German cockroach page explains how fast they build up.
First, what not to do
These come up a lot, and none of them fixes the problem:
- Don't run the microwave empty to "cook" them out.
- Don't put the coffee maker in the freezer.
- Don't spray insecticide inside any appliance.
- Don't set off a bug bomb. It doesn't reach the gaps where roaches enter or hide, and it can push them deeper into the walls. More on why bug bombs don't work on roaches.
Roaches in the microwave
Unplug it, clean it, and stop using it until it's clean. Wipe out the inside, the turntable and the door seal, and clean the outside vents and the gap where it sits. Follow the manufacturer's instructions for cleaning, and don't take apart anything you're not supposed to open. For an over-the-range microwave, check the cabinet above it and the vent area. Roaches often hide right there.
Roaches in the coffee maker
Unplug it and clean it the same way: empty the reservoir, wash every removable part, and wipe the base and the area under it. Coffee makers sit by the sink, which gives roaches water nearby. Some people decide to replace an inexpensive coffee maker or toaster rather than deal with it. That's your call; we can't promise any appliance can be saved.
Roaches in the dishwasher
Dishwashers bring water, food residue and a warm motor together. Clean the filter, wipe the door gasket and the edges of the door, and don't leave dirty dishes sitting in it for days. Look at the gap between the dishwasher and the cabinet and under the sink next to it, since roaches use the plumbing to travel. If you're also seeing them around the sink, read about roaches coming up the drain.
Other appliances to check
- The fridge: the motor area at the bottom and the drip pan.
- The toaster and toaster oven: crumbs collect in the base.
- The stove: the gap between the stove and the counter, and under the drawer.
How we treat roaches in appliances
The fix is treating the kitchen, not just the appliance. It's the approach on our German cockroach page:
- Inspection. We find the hot spots, usually appliances, cabinets and plumbing.
- Gel baits in cracks and crevices around and behind appliances, where roaches feed and hide. Nothing goes on food-contact surfaces or inside where food goes, like the microwave cavity, the coffee maker's reservoir or the dishwasher tub.
- Growth regulators so young roaches can't mature and reproduce.
- Follow-up. German cockroaches usually take more than one visit.
Keep kids and pets off treated areas until dry, and follow your technician's instructions. If you've been seeing small roaches around the kitchen in general, our post on small roaches in the kitchen covers the signs. See our roach control and pest control pages for more.
Our general pest plan is $125 per quarter, about $42 a month, and monthly or custom schedules are quoted after the inspection. For plan customers: "If pests come back between visits, so do we, at no extra cost." There are no long-term contracts and no cancellation fees, just a simple service agreement. We're family-run and licensed, with 30+ years in the business, and hablamos español. More in our guides.
Appliance roach questions
How do I get roaches out of my microwave?
Can roaches live in a coffee maker?
Should I throw away an appliance with roaches?
Why are there roaches in my dishwasher?
Get them out of the kitchen.
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