You can get rid of firebrats naturally by finding where they are hiding, vacuuming insects and accessible eggs, removing food sources, correcting excess moisture, making extremely warm hiding areas less favorable, sealing cracks and openings, and trapping the insects that remain. These methods do not depend on insecticides, but they work best as a combined strategy rather than as isolated tricks.
The most important part is finding the source. Firebrats spend much of the day concealed in cracks and other protected spaces, then emerge at night to forage. Because they can travel away from those hiding places, repeatedly killing the firebrats you happen to see may have little effect on the population producing them. Natural control becomes much more effective once you know where the insects are concentrated.
Find the Hot Spots Before Trying to Eliminate Them
Start your search around unusually warm parts of the building. Firebrats thrive at temperatures above 90°F and are commonly associated with furnaces, boilers, ovens, fireplaces, water heaters, hot-water pipes, heating units, and warm attics. Check cracks, edges, pipe penetrations, spaces beneath or behind equipment, nearby storage areas, and other protected locations where heat persists. UC IPM also notes that firebrats can travel considerable distances while searching for food, so a specimen found in one room does not necessarily reveal where the population is living.
Sticky traps can help narrow the search without using pesticides. Place them along walls, in corners, behind suitable appliances, and near suspected harborages, then compare catches rather than relying on a single trap. Another option recommended in extension guidance is a glass jar wrapped on the outside with masking tape. The rough tape lets firebrats climb to the rim, while the smooth interior prevents trapped insects from climbing back out. Trapping is particularly useful here as a diagnostic tool because it shows which locations deserve the most attention.
Vacuum Firebrats, Eggs and the Debris They Feed On
Once you locate active areas, vacuum them thoroughly. Concentrate on cracks you can reach, floor edges, baseboards, shelving, cupboards, closets, storage spaces, beneath movable appliances, and other undisturbed areas where insects or debris accumulate. Vacuuming can physically remove firebrats and accessible eggs while simultaneously removing crumbs, dead insects, dust, shed material, and other organic matter that may contribute to their food supply.
This is more useful than simply vacuuming whichever adult happens to run across the floor. Health Canada recommends frequent vacuuming, particularly around appliances, cupboards, drawers, pantries, sinks, and machinery. Empty or dispose of collected debris appropriately afterward so captured insects are not left inside the home. Vacuuming will not reach every firebrat concealed deep inside walls or inaccessible crevices, which is why it needs to be paired with changes to the habitat.
Take Away as Much Food as You Reasonably Can
Firebrats have a broad diet, so natural control requires more than wiping crumbs from a countertop. They can use starchy foods, cereals, flour, paper-associated adhesives, book bindings, wallpaper paste, certain textiles, fungi, dead insects, and assorted household debris. They can also survive lengthy periods without feeding, so removing food should be viewed as a way of making the environment progressively less supportive rather than an instant starvation method.
Store flour, cereals, pasta, pet food, and other vulnerable dry foods in tightly closed containers. Clean crumbs and food debris from cupboards, beneath appliances, and along edges that are rarely disturbed. Reduce unnecessary piles of cardboard, old papers, and similar clutter around areas where firebrats are active, particularly when those materials remain untouched for long periods. You do not need to empty the house of every paper product. The objective is to reduce concentrated combinations of food, shelter, and undisturbed hiding space. The range of materials these insects can use is explained more fully in what firebrats eat.
Correct Moisture Problems Without Expecting Dryness Alone to Solve It
Repair leaking pipes and faucets, dry persistent wet areas, improve ventilation where appropriate, and deal with condensation around plumbing. Health Canada recommends repairing leaks and insulating pipes where condensation is a problem, while UC IPM includes removing water sources among the environmental changes used against firebrats and silverfish.
However, firebrats are not as dependent on very humid environments as common silverfish. They can tolerate considerably drier conditions, so reducing humidity should not be treated as a stand-alone firebrat cure. A dehumidifier may be useful where excessive humidity genuinely exists, but drying the room while leaving a warm protected harborage, abundant food, and numerous cracks untouched may leave much of the problem intact. Natural control works better when moisture correction is one part of a broader habitat change.
Reduce Excess Heat Around the Infested Area
Heat is especially important because firebrats are adapted to unusually warm environments. If trapping repeatedly identifies activity around hot-water pipes, boilers, water heaters, furnaces, or other heated spaces, look for safe ways to reduce unnecessary environmental heat and improve air circulation. Missouri Extension recommends lowering temperatures around hot-water pipes, water heaters, and boilers as part of firebrat management.
This does not mean lowering an appliance below its safe operating temperature or interfering with heating equipment. The target is the surrounding microhabitat where practical, not the appliance’s required internal temperature. Insulating appropriate hot pipes, improving ventilation, and reducing unnecessarily trapped heat can make a hiding area less favorable without compromising equipment operation. If you keep finding firebrats around one particular heat source, their location may also help explain what caused the firebrats to become established in the house.
Seal Cracks After You Identify the Active Areas
Firebrats have flattened bodies and can shelter inside very narrow spaces. Seal accessible cracks and crevices around baseboards, cabinets, wall penetrations, door and window frames, and similar locations where the insects can hide or move between areas. Gaps around pipes and conduits deserve particular attention because firebrats can travel through buildings along plumbing and through openings in walls and floors.
Do this strategically rather than applying caulk to random cracks throughout the house. Monitoring first helps identify which areas are actually being used, allowing you to concentrate on relevant shelter and travel routes. In apartments and other multi-unit buildings, exclusion may reduce movement into your living space, although firebrats can still originate from inaccessible or adjoining areas outside your control.
Keep Traps Down Long Enough to Measure Whether It Worked
Continue using traps after sightings decline. Firebrats are nocturnal and secretive, so not seeing one for several days does not prove the population is gone. Mark where each trap is located and compare catches over time. Declining numbers across the previously active locations provide much stronger evidence that your environmental changes are working.
Persistent captures are useful too because they tell you where to look again. If one trap continues catching firebrats while others remain empty, inspect the surrounding cracks, pipe routes, heat sources, food storage, and adjoining spaces more closely. UC IPM notes that persistent activity after control efforts can indicate insects coming from untreated or secluded harborages. In a pesticide-free approach, that information is particularly valuable because locating and removing the conditions supporting the insects is doing most of the work.
Be Skeptical of Homemade “Natural” Firebrat Remedies
Natural does not automatically mean proven, effective, or harmless. Internet recommendations for household pests commonly include essential oils, vinegar, baking soda, herbs, homemade sprays, and assorted strongly scented substances. A substance smelling unpleasant to an insect is not the same as demonstrating that it can eliminate a population living inside a building.
For firebrats specifically, the authoritative guidance we reviewed gives much stronger support to physical removal, sanitation, habitat modification, exclusion, and trapping than to homemade repellents. Those methods also address why the insects can survive in the building rather than merely attempting to repel an exposed individual.
Be equally cautious with substances marketed as natural powders or dusts. A product’s natural origin does not mean it is appropriate to breathe, scatter freely around living areas, or place where children and pets can contact it. This article therefore does not treat an unverified household substance as a firebrat remedy simply because it avoids a conventional insecticide.
Know When a Pesticide-Free Approach Is Not Reaching the Source
Natural control is most realistic when you can locate the active areas and change the conditions supporting them. If trap catches continue despite thorough cleaning, moisture correction, temperature management, exclusion, and repeated vacuuming, the population may be established somewhere you cannot readily access. Wall voids, utility spaces, connected apartments, inaccessible pipe routes, and areas around building systems can all complicate control.
At that point, the useful question is not which additional homemade substance to try. Reassess where the insects are coming from and whether the harborage is actually accessible. The main firebrat removal guide covers the broader control options available when a strictly non-chemical approach is not enough. If you want to remain pesticide-free, professional inspection can also be used to locate an infestation without committing you to a particular treatment method.
Questions About Getting Rid of Firebrats Naturally
Can you trap firebrats without killing them with pesticides?
Yes. Sticky monitors and simple glass-jar traps can capture firebrats without applying an insecticide. Traps are especially useful for locating active areas and measuring whether the population is declining.
Will cleaning alone get rid of firebrats?
Not necessarily. Cleaning removes potential food and accessible insects, but firebrats may remain concealed in cracks and can survive for long periods with little food. Cleaning is more effective when combined with trapping, exclusion, moisture correction, and changes to excessively warm harborages.
Can I simply catch and release firebrats outside?
You can physically remove individual firebrats, but doing so does not address an indoor population if other insects remain concealed in the building. Repeated sightings are a reason to locate the harborage rather than repeatedly removing individual insects.
Do ultrasonic pest repellers get rid of firebrats naturally?
We did not find authoritative firebrat-control guidance establishing ultrasonic repellers as an effective way to eliminate an infestation. Physical monitoring and habitat changes provide much more useful information about whether the population is actually declining.
Can firebrats disappear if the room becomes cooler?
Making an excessively hot location less favorable can contribute to control because firebrats strongly prefer high temperatures, but cooling alone should not be assumed to eliminate every insect. Firebrats can move elsewhere in a building, so continue monitoring while also addressing food, water, shelter, and access routes.