Where the source usually hides in a Fort Worth house
Start with the places that are warm, dark, and rarely wiped. In Fort Worth housing the attached garage is first on the list, because summer temperatures out there run above the air conditioned kitchen and a recycling bin holds enough residue to support a colony without looking dirty. Inside, the ranking goes: the space under and behind the refrigerator, the drip pan beneath it, the seam between the counter and the stove, the underside of the sink strainer, and the bottom of the trash can where liquid pools under the bag. Pantries matter too. A bag of onions or potatoes with one soft item at the bottom will run a population for weeks, and because it sits in a closed cabinet nobody thinks to check. The rule that makes this easier: flies concentrate near where they emerged. If the cloud is thickest in one corner of the room, the source is in that corner, usually within a few feet and usually below waist height. Follow the density rather than searching everywhere at once.
Why the problem peaks in September and fades by January
The seasonal shape here is more pronounced than on the Gulf coast, and it helps to know what to expect month by month. March through May is a slow build. Warm days start the outdoor cycle, produce comes home from the store more often, and the occasional fly appears without becoming a crowd. June through September is the hard part. With highs near 96F, garages, patios, and pantries hold temperatures that keep development near the fastest end AgriLife Extension reports. This is when one forgotten item becomes a service call. October and November match the national indoor peak the University of Maryland Extension identifies, with holiday cooking, more produce in the house, and more entertaining adding sources. December through February is the quiet stretch, since an average low around 35F closes down the outdoor supply. Anything active in a Fort Worth kitchen in January is living on something indoors, which actually makes it easier to find: the search area is only as large as your house.
What a real inspection covers, step by step
You are paying for the search, not the spray, so judge the visit on how thoroughly the technician looks. A proper walkthrough uses a flashlight behind and beneath the refrigerator, dishwasher, and range, checks the drip pan, runs water in every sink while watching the drain, opens the disposal and inspects the splash guard, and looks inside the trash, recycling, and compost containers. In this city that walk should extend to the garage, its bins, and any floor drain out there. For a commercial account it should also include bar mats, drip trays, soda gun holsters, mop sinks, and the grease line. What you should leave with is a written list of the exact places found, what the provider handled, what you need to handle, and when they will return. A return spaced roughly two weeks out matches the biology. If the plan is a spray now and a spray next month with no inspection notes, that is a subscription rather than a solution.
Renters, landlords, and the two week test
In a duplex or an apartment, the argument over responsibility usually stalls because nobody has evidence. There is a simple way to get some. For two weeks, do everything under your control: refrigerate produce, wash and dry the recycling bin, brush the disposal, take trash out nightly, dry the mop, and pour water down any floor drain. Set baited cups and write down the daily catch on paper or your phone. If the count falls, the source was yours and you have solved it. If it stays flat, you now have a record showing the flies are coming from somewhere outside your unit, and the likely candidates are a shared trash room, a dried out common floor drain, or a waste line behind a wall. Send that to management in writing and ask specifically for a drain and waste line inspection rather than a general treatment. Landlords have their own incentive to move: flies travel along shared plumbing, so one unaddressed source becomes complaints from several units within a month.
Five questions that separate two quotes
Pricing on fly work is about labor and visits, so ask about those rather than about products. One: will you identify the species and name the breeding site before treating? Two: does the inspection include the garage and its floor drain? Three: is drain line cleaning inside this price or an add on? Four: how many visits does the number cover? Five: what happens if flies are still here in three weeks? The cheapest quote is nearly always a single visit with an aerosol. That price works out badly, because anything that pupated before the visit emerges within days and you buy a second service. Two visits spaced about two weeks apart cost more up front and usually less overall. Ask what prep they expect from you as well. A company that wants produce cleared, bins emptied, and floors dry before arrival is planning to inspect. A company that wants nothing is planning to spray.