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How to Choose an Indoor Fly Killer Spray

It can be difficult to choose the right indoor fly killer spray with so many options these days. You want an effective fly solution that’s also family-friendly, right? Which one should you be using? 

You might consider an effective, more family-friendly fly killer spray. 

Indoor Fly Spray

What Are Some of the Most Common Indoor Flying Insects?

If conditions are right, flying insects will try to make a home inside your home whenever they can. Many are merely an annoyance, others are harmful to plants and pets, and others can be harmful to you and your family.

Here is a list of many flying bug pests you will likely encounter at home:

  • House flies
  • Gnats
  • Mosquitoes
  • Nuisance Moths (attracted to light, do not breed indoors)

Prevention is Better Than Any Pest Control Product 

Prevention of flies swarming around your home, garage, and yard is typically the best solution. Pest control products can be helpful in controlling flies in and around our home, but they are never a magic, quick solution. 

What is your best preventive approach to managing flying insects? Glad you asked! Read on for some suggestions!

Seal and block off places where flies, gnats, mosquitoes, and moths can enter your home. 

 Seal up entry points to prevent flying insects

  • How well are your windows sealed? Replace window weather stripping as needed. This will also help reduce your utility bills. Make sure all your screens are in good working condition.
  • Caulk cracks, crevices, and utility entry points on your home’s exterior. Use steel wool to fill gaps around pipes and cables, and cover large gaps with wire mesh.
  • If you want to eliminate problems with flying insects being attracted to outdoor lights, replace your outdoor lighting with yellow bulbs.

Eliminate sources of breeding and food for flies, gnats, mosquitoes, and moths. 

  • Sanitation will be your best line of defense against flies (and other insects). Don’t leave dirty dishes lying around, vacuum regularly, and keep surfaces clean and wiped down. Pour bleach water down sink and tub drains.
  • Careful not to overwater plants – the soil can get swampy and attract gnats and even mosquitoes. Move plants outside, or in the garage, at least temporarily. Keep damp areas mopped and wiped up.
  • Tightly cover all garbage cans containing food scraps and take garbage out regularly.
  • Keep bushes and hedges tightly trimmed to help eliminate breeding areas for mosquitoes.
  • Eliminate (or regularly refresh) sources of stagnant water where mosquitoes may breed (birdbaths, pet water dishes, buckets, hot tubs, pool covers, kiddie pools, or anything else where water collects). Use mosquito dunks for ornamental water as needed.

Using Indoor Fly Killer Spray (and Other Pest Control Products)

After you have completed preventive steps and you’re still seeing flying bugs, you may need to use some pest control product(s). 

If a particular infestation has become overwhelming, call a pest management professional (PMP). 

If you hire a PMP, ask him or her to find and correct the source of the problem before applying any pesticides. A PMP should be able to give you information about any chemicals used (i.e. a safety data sheet, or SDS). In most cases, homeowners can manage some of their own pest problems, assuming they follow product label instructions. 

How to Get Rid of Indoor Flying Insects

If You Don’t Hire a Professional: How to Choose an Indoor Fly Killer Spray

Two main types of active ingredients are used to formulate pest control products: synthetic (formulated in a lab) or naturally derived/naturally occurring formulations (a.k.a. green, botanical, etc.), which take an earth-friendlier approach to pest control by using plant-based ingredients or essential oils as their active ingredients.

Indoor fly sprays can be divided into two main categories: non-aerosol and aerosol sprays. Aerosols, once classified as being harmful to our earth’s ozone layer, now practically all use (the ones allowed for sale in the United States, at least) delivery propellants that are considered environmentally safer. Non-aerosol sprays use some sort of trigger-action mechanism for application.

It is advised that you take caution regarding what type of pest control products you use, and research them well, especially when using on or near your clothes, skin, bedding, etc. 

Synthetic Indoor Fly Sprays

The most common ingredients used to formulate conventional fly sprays are synthetic chemicals. If synthetic products are labeled for home pest control, it’s important to know that the residues of synthetic chemicals typically take longer to dissipate and can be highly toxic to fish and other animals. Synthetic products may also leave harmful residues behind.

Green Indoor Fly Killer Sprays

We aren’t alone in our desire to get rid of bugs! Plants use their own oils as a built-in defense system against bugs, and these oils are quite potent and effective at killing and repelling unwanted pests. Plants want protection from bugs, too!

If you prefer to choose a more family-friendly indoor fly spray, you can still count on a high kill rate plus residual protection. Most earth-friendly fly sprays are made using some combination of plant-based ingredients and/or essential oils (e.g., peppermint oil, wintergreen oil, geraniol, rosemary oil, etc.).

Sprays are healthier for the environment and your family since they break down more quickly in the environment, do not leave behind any harmful residues, and are more kid- and pet-friendly.

Many terms are used to describe “green” pest control products, but it is not necessarily appropriate to use them interchangeably. Read up on the differences between natural, organic, and green products.

Maggie’s Farm offers a highly effective green solution option available in a ready-to-use product, which requires no mixing and no need to store it in your home for years while trying to use it gradually, as you would with a concentrate. 

So, Where Do You Apply an Indoor Fly Killer Spray?

Most indoor flying insect applications are made as direct contact sprays to the pesky insects. You can also use them to create a repellent barrier around windows, doors, screened-in porches, etc. to keep flying pests from getting inside.

You can potentially find flying insects in any room of your house, but for most homes, the kitchen, bathroom, and where flying insects may enter your home are prime areas for them to hang out. You can also find them in and around garbage cans, crawlspaces, basements, garages, and other areas where water may puddle, as these places are quiet, out of the way, and provide great places for them to hide and lay eggs. 

Compost piles outdoors near your home are also prime targets for flying bugs. These are also areas you can apply a repellent barrier spray to as well.

How Do You Apply Flying Insect Spray? 

Indoor Spray Application Tips

  • Shake container well to combine all ingredients properly. Shake periodically during use.
  • If using an aerosol, point the spray nozzle away from your face before spraying. If using a trigger spray bottle, set the nozzle to the “spray” setting (not “stream”)
  • To kill flies, gnats, mosquitoes, moths and other flying insects, direct spray at flying insects and contact as many as possible. Repeat as necessary.
  • If using an aerosol, spray in short 2 to 3-second bursts. For best results, spray flies when they are resting to get the best spray coverage possible.
  • Spray areas where flying insects may be entering. Hold container 12 inches from surfaces being sprayed.
  • When using indoors, wipe up excess.
  • Don’t assume twice as much is doubly effective. You may endanger your health and the health of your family and pets. After spraying a room, ventilate the room well.

General Product Tips

  • Always read and follow the indoor fly spray’s label directions and safety information for use and information regarding proper storage/disposal.
  • You can usually use pest control products both indoors and out, though some are specifically labeled for outdoor use only.  
  • Store pest control products in original containers only. And store all pest control products in a cool, dry place and out of the reach of children and pets. 
  • Read and follow the disposal information of the product label for empty and partially filled containers 

Outdoor Flying Insect Spray

Outdoor Spray Application 

  • For effective indoor fly control, it’s a good idea to apply product in targeted areas that may be entry points into your home. Start by walking around the structure’s foundation to inspect. Some possible entry points to look for are around doors and windows, around screened-in porches, and any visible cracks or gaps, such as around utility lines and pipes.
  • When using outdoors, spray breeding areas such as in and around garbage cans and compost piles.
  • Be sure not to spray in wet conditions as this can weaken the spray’s effectiveness.
  • When spraying outdoors, spray with the wind to avoid getting sprayed.

Indoor Fly Killer Spray around Plants

When spraying near indoor plants, be careful since indoor plants are not as hearty as their outdoor counterparts, and botanical oils can potentially burn your indoor plants if not used properly.  


Your best long-term strategy to keep flying bugs in check is to use pest control products as a final step. There are several things you can do to keep them out of your home: 

  • Eliminating entry points into your home as much as possible
  • Eliminating their water, food, and breeding areas, by keeping things clean, vacuumed, wiped down, and well-trimmed outside
  • Removing/refreshing stagnant water regularly
  • Apply a repellent barrier to all possible entry points around the exterior of your home.

    What are your go-to application techniques? We’d love to hear about them! Leave a comment below. Be sure to sign up for email updates and to follow us on social!


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