STEM Kills Indoor and Outdoor Flies Mosquitoes and Gnats Insect Killer Bug Spray, 10 oz
STEM Kills Indoor and Outdoor Flies Mosquitoes and Gnats Insect Killer Bug Spray, 10 oz
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STEM Kills Indoor and Outdoor Flies Mosquitoes and Gnats Insect Killer Bug Spray, 10 oz

4.2 stars out of 1994 reviews
(4.2)|
1,994 ratings

Key item features

  • Bug spray that quickly kills flies, mosquitoes, and gnats
  • Plant-based active ingredient bug killer safe for use around people and pets (when used as directed)
  • Entomologist tested bug spray made with botanical extracts to kill bugs; with the fresh scent and no added dye, fragrance, or harsh chemical odors
  • Bug killer for indoor and outdoor use, wherever bugs try to bother you​
  • Rooted in Nature, Optimized by Science
Current price is $7.2872.8 ¢/oz
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One-time purchase $7.28

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Columbus, 43215
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STEM Kills Indoor and Outdoor Flies Mosquitoes and Gnats Insect Killer Bug Spray, 10 oz $7.28 72.8 ¢/oz

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Customer ratings & reviews

4.2 out of 5 stars
stars1,994 ratings1,338 reviews
How item rating is calculated

Reviews summary

Pros
  • : Product is safe for use around pets and children.
  • : Kills bugs in a short amount of time.
  • : Has a non-overpowering and refreshing aroma.
Cons
  • : Leaves a slippery or oily residue on surfaces.
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Showing 1-3 of 1,338 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?1SFP9QAIORZE1229492393
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

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?1SFP9QAIORZE1229492393
Jul 15, 2024
ladyg
1 out of 5 stars review

Verified Purchase

careful where you step!!

this is an oil based product and if it is on the floor watch your step. my son fell because he slid on its oily residue it left behind. the smell is awful. i feel that in order to kill the flies i had to spray them direct contact. spend the extra dollar or two and get a product that works without the threat of injury .

Helpful?1SFP9QAIORZE1229492393
reply from stem Team

Thank you for your review. We're sorry to hear about what happened. We take comments like yours seriously and would like to chat further. When you can, please give us a call at 877-869-7546, weekdays between 8 a.m. and 5 p.m. CT. Be sure to mention your reference number, which is 22540504. Hope to hear from you soon! – Brooklyn, STEM Consumer Care