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STEM Kills Indoor & Outdoor Fly, Mosquito & Gnat Insect Killer Bug Spray Value Size, 12 oz

Key item features

  • Natural Ingredients: Essential oil-made bug spray effectively kills flies, mosquitoes, and gnats using plant-based active ingredients.
  • Safe Application: Formulated for safe use around children and pets when applied as directed, ensuring family well-being.
  • Pleasant Scent: Features a fresh scent without added dyes, fragrances, or harsh chemical odors, enhancing user comfort.
  • Expert Tested: Entomologist-tested pesticide for home use, confirming its efficacy against flying insects.
  • Botanical Actives: Developed with geraniol and lemongrass, neurotoxic essential oils that target the nervous system of pests.
  • Versatile Use: Suitable for both indoor and outdoor applications, creating a bug-free environment in various settings.
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Current price is $7.9666.3 ¢/oz
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About this item

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Customer ratings & reviews

4.1 out of 5 stars
stars810 ratings256 reviews
How item rating is calculated
5.0
3.8
2.1
2.4
5.0
  1. 5 stars62% (506)
  2. 4 stars12% (95)
  3. 3 stars8% (64)
  4. 2 stars4% (36)
  5. 1 star13% (109)

Reviews summary

Pros

  • : Safe for use around pets and children.
  • : Repels mosquitoes and other flying insects.
  • : Simple navigation and operation.
  • : Kills on contact, especially fruit flies and gnats.

Cons

  • : Leaves a film on surfaces after use.
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Showing 1-3 of 256 reviews

Feb 20, 2026
FRAN
Top Reviewer
Item details
Scent: Fresh
5 out of 5 stars review

Verified Purchase

Great product. Worked perfectly for me at low cost

Due to the extreme cold this winter, I really had a bundle of her dog walking I put on too many pairs of socks, Due to the extreme cold this winter, I really had a bundle of her dog walking I put on too many pairs of socks , so my pinkie toes were pinched inside my boots. Instant relief with these. I had to wear lightweight socks around the house and to bed so they didn't slip off, but with days my toes were better than ever!!!!

Helpful?6F3NUFYDNJ42975519275
Nov 8, 2025
Sara
Top Reviewer
Item details
Scent: Fresh
5 out of 5 stars review

Verified Purchase

LOVE IT

We've had a problem with pantry moths and tried numerous other products that were not effective nor safe. I tried STEM gnat and fly spray and it wiped them out! I sprayed once and resprayed the following day. I waited a week for any other eggs to hatch and sprayed again. Haven't seen them since.

Helpful?6F3NUFYDNJ42975519275
Jun 11, 2025
anonymous
Item details
Scent: Fresh
5 out of 5 stars review

Verified Purchase

Pretty goid

I'm not gonna lie, the reviews kinda gave me a reason to believe this product wouldn't work, but it WORKED, you spray on contact, kills within a couple seconds, only thing is the smell kinda strong bothers me, but I'm not gonna complain cause it did its job also it is oily but it doesn't matter it worked

Helpful?6F3NUFYDNJ42975519275