(3 pack) STEM Kills Indoor and Outdoor Flies Mosquitoes and Gnats Insect Killer Bug Spray, 10 oz
(3 pack) STEM Kills Indoor and Outdoor Flies Mosquitoes and Gnats Insect Killer Bug Spray, 10 oz
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(3 pack) STEM Kills Indoor and Outdoor Flies Mosquitoes and Gnats Insect Killer Bug Spray, 10 oz

(3 pack) STEM Kills Indoor and Outdoor Flies Mosquitoes and Gnats Insect Killer Bug Spray, 10 oz3 pack STEM Kills Indoor and Outdoor Flies Mosquitoes and Gnats Insect Killer Bug Spray 10 ozSTEM Kills Indoor and Outdoor Flies Mosquitoes and Gnats Insect Killer Bug Spray 10 oz
Pack Size:3 Pack

Key item features

  • Effective Insecticide: Quickly kills flies, mosquitoes, and gnats, providing immediate relief from common indoor and outdoor pests.
  • Plant-Based Formula: Utilizes a plant-based active ingredient, making it safe for use around people and pets when directed.
  • Botanical Extracts: Formulated with botanical extracts, ensuring an effective bug killer without added dyes, fragrances, or harsh chemical odors.
  • Entomologist Tested: This bug spray has been tested by entomologists, confirming its efficacy against target insects.
  • Versatile Application: Designed for both indoor and outdoor use, offering protection wherever bugs are present.
  • Scientific Optimization: Rooted in nature, the formula is scientifically optimized to deliver effective bug-fighting capabilities.
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Current price is $21.8472.8 ¢/oz
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This item includes:

  • 3-pack of STEM Kills Indoor and Outdoor Flies Mosquitoes and Gnats Insect Killer Bug Spray, 10 oz
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Customer ratings & reviews

4 out of 5 stars
stars1,149 ratings409 reviews
How item rating is calculated
  1. 5 stars59% (680)
  2. 4 stars13% (145)
  3. 3 stars8% (91)
  4. 2 stars6% (70)
  5. 1 star14% (163)

Reviews summary

Pros

  • : Has a simple trigger or twist-to-use mechanism.
  • : Kills and repels flies, mosquitoes, and gnats on contact.
  • : Product is safe for use around pets without harm.
  • : Has a non-overpowering and natural scent.
  • : Quickly kills mosquitoes, providing relief.

Cons

  • : Leaves behind a residue that requires cleaning.
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Showing 1-3 of 409 reviews

May 19, 2025
Chert
Top Reviewer
Item details
Multipack quantity: 1
5 out of 5 stars review

Verified Purchase

Stems Kill Fly Spray

Does the job! Caution, I sprayed some in the kitchen %26 it got on the floor and a few min later, I went back and slipped. Please be careful. So now I just use it where I wont be walking. Trash cans outside, etc. I've bought it a couple of times bc it works. Kills maggots in the big trash can outside as well. Yep, its summer folks...

Helpful?1SFP9QAIORZE15334874580
reply from stem Team

We appreciate you sharing this with us! We’re sorry to learn about what happened. Please know comments like yours are taken seriously and we’d like to talk more about your experience. When you have a moment, give our team a call weekdays from 8 a.m. to 5 p.m. CT at 877-869-7546 and provide this reference number: 22858681. We look forward to your call! – Mindi, STEM Consumer Care

Dec 23, 2025
Elmer
Top Reviewer
Item details
Multipack quantity: 1
5 out of 5 stars review

Verified Purchase

This is the best thing I have found for flying insects in the home. It killed our fruit flies that had come in from the cold last week. It's safe around kids, the elderly, and pets. Our household was a good example for it's use. No more toxic sprays for us. A great buy.

Helpful?1SFP9QAIORZE15334874580
Nov 17, 2025
Angelisa
Top Reviewer
Item details
Multipack quantity: 1
5 out of 5 stars review

Verified Purchase

Worldwide gnat infestation

During the summer we noticed so many gnats and fruit flies everywhere (we had no fruit in sight) this is the only spray that would kill them instantly. The only thing is, it is extremely oily. So after you spray, the floor will be slippery if you have wood or if you spray those pesky demons in your bathroom. Also, our fruit flies actually turned into BIG BLACK FLIES and this spray killed them alllllll. Better than all the others. Hopefully the infestation will be over next year but if not i know what i'm getting

Helpful?1SFP9QAIORZE15334874580