Fly strips are one of the simplest and cheapest ways to control flies indoors. They work by coating a ribbon or paper surface with a sticky adhesive that traps flies on contact, holding them in place until they die. Most fly strips you’ll find at a hardware store are non-toxic glue traps, though some pest strips use a different approach with embedded insecticides. Knowing the difference matters, especially if you have kids or pets.
How Fly Strips Work
The standard fly ribbon is just a paper strip coated in a thick, extremely tacky glue. Most products include an attractant mixed into the adhesive, something that draws flies toward the strip through scent. Once a fly lands, the glue is strong enough that it can’t pull free. There’s no poison involved in the trapping itself.
A second category of pest strip works differently. Instead of relying on glue, these strips are made from a porous material soaked with an organophosphate insecticide. The active chemical slowly releases into the surrounding air and kills insects that come into contact with it. These are a fundamentally different product from a simple sticky ribbon, and the packaging will clearly state if an insecticide is present. For most household fly problems, the basic glue-type ribbon is what people reach for.
Where to Hang Them for Best Results
Placement makes a bigger difference than most people expect. A fly strip hung in the wrong spot will sit there for weeks barely catching anything, while the same strip in a better location fills up in days.
The most important rule is to hang the strip where it can dangle freely, not flat against a wall or in a corner. When a strip hangs in open air, flies can land on it from every direction. Doorways between rooms are a popular choice because flies naturally travel through these high-traffic zones. Kitchens, near trash cans, and around windows where flies tend to gather are other strong options.
Hang strips at roughly head height, around five to six feet off the ground. This puts them in the zone where houseflies spend most of their time circling. Too low and you’ll walk into them. Too high and they’re above where flies are most active. If you’re dealing with a serious fly problem, put up several strips spread across the area rather than relying on a single one.
Keep strips away from fans, air vents, and areas with strong drafts. Moving air makes it harder for flies to land and can also dry out the adhesive faster, shortening the strip’s useful life.
How Long They Last
A fresh fly strip typically stays effective for about one to three months, depending on the brand and conditions. Heat, dust, and humidity all affect how tacky the glue remains. In a hot, dusty garage, a strip might lose its stickiness in a few weeks. In a clean kitchen, it can last the full season.
Replace a strip when it’s visibly covered in flies, when the surface looks dusty or dried out, or when you notice flies landing on it and walking away. Most strips are inexpensive enough that replacing them frequently isn’t a real cost concern. A pack of a dozen ribbons typically costs a few dollars.
Safety Around Pets and Children
Standard glue-based fly ribbons pose minimal toxicity risk. The adhesive isn’t poisonous, and if a child or pet touches one, the main issue is the sticky residue on skin, hair, or fur. Vegetable oil or cooking spray dissolves the glue effectively for cleanup.
If a child or pet actually swallows a piece of a glue strip, the concern is less about poisoning and more about the physical material. A small piece of paper and glue will generally pass through without trouble, but larger amounts could theoretically cause a blockage, particularly in small dogs or cats.
The real safety concern is with the insecticide-impregnated pest strips. These contain chemicals that are genuinely toxic and should not be used in rooms where people or pets spend extended time. The packaging on these products carries specific warnings about room size, ventilation, and exposure limits. If you’re buying fly strips for a kitchen, bedroom, or any lived-in space, stick with the simple glue ribbons and avoid the insecticide versions entirely.
Tips for Getting the Most Catches
Fly strips work best as part of a broader approach. They catch flies that are already inside, but they won’t stop new ones from entering. Keeping doors and windows screened, covering food waste, and cleaning up pet waste outdoors all reduce the number of flies you’re dealing with in the first place.
If you’re using strips in a barn, garage, or workshop, the larger tube-style sticky traps tend to outperform the small ribbons simply because they have more surface area. Some of these larger commercial traps can catch hundreds of flies before they need replacing.
For fruit flies specifically, the standard hanging ribbon isn’t ideal. Fruit flies tend to hover low, near countertops and fruit bowls, rather than flying at head height. A small dish trap with apple cider vinegar or a purpose-built fruit fly sticky trap placed on the counter will outperform a hanging ribbon for that particular pest.