STEM Flying Insect and Mosquito Killer Bug Spray - 10oz
$7.29
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This insect spray is highly effective for tackling various pests like gnats, flies, and roaches, providing immediate results upon contact. Guests appreciate its plant-based formula, making it safe for use around children and pets. While it has a pleasant lemongrass scent, some users noted it leaves an oily residue that requires cleanup. Overall, it serves as a reliable solution for pest control in both indoor and outdoor settings, especially during peak bug seasons.
Summary created by AI from text of reviews reflecting recent feedback provided across different star ratings (includes incentivized reviews)
4.5 out of 5 stars with 1009 reviews
quality: 2.75 out of 5
value: 2.75 out of 5
52% would recommend
19 recommendations
1 out of 5 stars
Thumbs down graphic, would not recommend
21 January, 2026
Worthless oil bug spray
absolutely worthless. You have to spray it, directly on the bug after it lands. This is laughable. It's just oil. I could go grab some mineral oil, which this basically is, and dab it on the bug after a lance. It's just oil and slippery you can't spray it in the air, I've had a product like this once before and they don't do anything. I ended up bringing it back
1 reply from stem Team team - 25 days ago
Thanks for sharing this with us. We're sorry to hear of your experience. STEM Flies, Mosquitoes & Gnats is made with botanical extracts that fight nature with nature. We'd like to learn more about this and have the chance to help. Please give our experts a call at 877-869-7546 (weekdays between 8 a.m. and 5 p.m. CT) and provide your reference number: 23052453. We look forward to helping you find a science-backed way to keep bugs at bay! – Mindi, STEM Consumer Care
1 out of 5 stars
Thumbs down graphic, would not recommend
31 July, 2025Verified purchase
SLIPPERY BUG SPRAY
This spray made the floor very greasy where you sprayed to the point I had to mop it up to keep from slipping down.
1 reply from stem Team team - 7 months ago
Thanks so much for reaching out! STEM Flies, Mosquitoes & Gnats contains essential oils, which can sometimes leave a bit of an oily residue. That’s why we recommend spraying it directly on insects only, as directed on the back label, and wiping away any excess after use. We'd appreciate the chance to chat and assist you further. Give us a call at 877-869-7546 (weekdays, 8 a.m. to 5 p.m. CT), and have your reference number 22913143 handy. We’re here to help and can't wait to get you back to bug–free! – Megan, STEM Consumer Care
3 out of 5 stars
Thumbs up graphic, would recommend
8 April, 2025Verified purchase
Good product
It works very well but when you spray it, it gets all over the spray bottle and your hand. The floor also gets very slippery with it.
1 reply from stem Team team - 9 months ago
We're sorry to hear about your experience when using this spray. We take comments like yours seriously and would like to chat further. Please give us a call at 877-869-7546 and mention your reference number: 22848673. We're available Monday through Friday between 8 a.m. and 5 p.m. CT. We look forward to your call! – Brooklyn, STEM Consumer Care
1 out of 5 stars
Thumbs down graphic, would not recommend
4 October, 2024Verified purchase
Gross
He has a funny smell it sprays towards you and it sticks to things and leaves a filmy thing on top
1 reply from stem Team team - 1 year ago
Thank you for sharing your experience with us. Our bug killer is formulated with essential oils, which may be the smell you notice. Any residue left can be wiped up with soapy water. We want to chat further to see how we can best assist you. Reach us at 877-869-7546 on weekdays between 8 a.m. and 5 p.m. CT. Your reference number is 22649526. Looking forward to chatting! – Brooklyn, STEM Consumer Care
3 out of 5 stars
Thumbs up graphic, would recommend
17 August, 2024Verified purchase
Killed the flies, left stubborn residue
If you have an infestation like I did from my son. Leaving a banana In his bathroom for a week it's worth it. It kills them on contact and got rid of The literal swarm in his bathroom be very careful. The spray goes far and is very hard to get off of surfaces especially mirrors. It's very slick and it smells slightly off-putting but not unbearable. If you only have a few just smack them but this is definitely worth it in emergencies. It will work immediately but you'll have to clean up.
5 out of 5 stars
Thumbs up graphic, would recommend
11 August, 2024Verified purchase
Highly recommend
This stuff is magical! I love that it is safe so I don’t have to be paranoid about having poison sprayed around the house. It says not to spray in the air, but I’ve had to do that for pesky flies and they literally just drop. This spray works faster to incapacitate bugs than wasp spray!
5 out of 5 stars
27 June, 2024
originally posted on stemforbugs
Knats problem in hot summertime
I sprayed the window sills. A few days later there were hundreds of dead knats all over the sprayed area. Works fantastic ! Where I live ( Az ) the heat brings them out at night. This is the best product ever I contacted a local exterminator and they had no answer for my problem STEM did the job and I will buy as long as I live here.
1 out of 5 stars
18 June, 2024
originally posted on stemforbugs
WASTE OF MONEY AND MESSY
This products does not work and its super messy, greasy and I still have GNATS. Even when I used t in my garage the ground had so much oil from this spray it was a mess.
1 reply from stempwr team - 2 years ago
We appreciate you letting us know what happened, and we too would expect this to take care of those gnats. Since STEM® Flies, Mosquitoes, & Gnats Spray contains essential oils, we don't recommend using them on floors. However, any oily residue should easily come clean with warm, soapy water. Call 1-800-558-5252 (weekdays, 8 a.m. to 5 p.m. CT) and include your reference number, 22511150, if we can be of more assistance. We hope to hear from you soon! - Mindi, SC Johnson Consumer Care
3 out of 5 stars
14 June, 2024
originally posted on stemforbugs
Believe it or not, trouble operating the bottle!
I can't get any action from the plastic cap. It will not depress to spray as the instructions describe and I'm sure I'm not supposed to pull it off in order to use. What's going on? This shouldn't be difficult!
1 reply from stempwr team - 2 years ago
We're sorry to hear you're struggling with this, Jack! To open the STEM® Flies, Mosquitoes, & Gnats Spray, you must unlock the spray function by moving the nozzle to the "open" icon, which is located below the spray nozzle and printed in the clear plastic. If we can be of any more help, please give us a call at 877-869-7546 and provide reference number 22508346. I hope this helps! - Mindi, SC Johnson Consumer Care
5 out of 5 stars
24 May, 2024
originally posted on influenster.com
Good, but
I think it's really good at Killing gnats and flies head on, but it doesn't stop them from coming back, it's a safe product to use and very confident to take with you.
5 out of 5 stars
19 May, 2024
originally posted on stemforbugs
Great product
I really hate flies. Where we live there's numerous kinds from tiny black flies to those nasty jumbo ones. We have Frenchies that are elderly so we abstain from using any kind of poison. Broke down and tried STEM it works wonderfully. Kills on contact.(yay) Great smell from lemongrass and easy to wipe up any excess. Will buy again and again. Thank you for great product.
1 out of 5 stars
25 March, 2024
originally posted on stemforbugs
Poor bug killer - great plant killer
Used it to eliminate gnat infestation on nascent tomato/pepper plants. Left the bugs ok. But killed the plants
1 reply from stempwr team - 2 years ago
Thank you for reaching out! We're sorry to learn about what happened. For best results, we only recommend using this per label directions. That being said, know we're here to help. So we can, please give us a call at 877-869-7546 (weekdays 8 AM to 5 PM CT) and provide your reference number: 22313778. Hope to hear from you soon! - Brooklyn, SC Johnson Consumer Care
4 out of 5 stars
22 March, 2024
originally posted on stemforbugs
Works great, less mess please
I love the fact that it kills flies and gnats on contact, however as they fly i seem to have to spray them midflight, there is an oily residue that drips EVERYWHERE. So I end up cleaning the whole room again and again. I wish they could make it as effective without the mess.
5 out of 5 stars
11 March, 2024
originally posted on stemforbugs
Absolutely works on roaches
Kills roaches fast with just one spray. Used around cats, dogs and chickens and never an I'll effect. Best product for pet owners. Absolutely buy again.
5 out of 5 stars
25 February, 2024
originally posted on stemforbugs
THE ONLY THING THAT WORKS
This is the only product that will kill German cockroaches, Ides, the pest control I saw them die instantly in front of me. When they walked right into it I was a little surprised to see the other review, and the guy said it doesn't work. It works amazing and the fact that it's plant-based, and safe for kids and animals makes me very happy you have a customer for life I don't say this lately good job and putting this together smart people
1 out of 5 stars
22 October, 2023
originally posted on stemforbugs
Was like spraying water!
Used it for flies and the flies laughed at me! Seriously it didn't kill one fly. Disappointing.
1 reply from stempwr team - 2 years ago
We're so sorry to hear this didn't do the trick, Val. As long as you're spraying the flies directly, we'd expect them to die on contact. Since this wasn't the case, we'd like to chat further to best help. In order to do so, please give us a call at 877-869-7546 (weekdays 8 AM to 5 PM CT) and provide your reference number: 22174787. Chat soon! -Alyssa, STEM Consumer Care
5 out of 5 stars
20 October, 2023
originally posted on stemforbugs
They drop out of the sky!
The dark corner of my patio where I stack the chairs became home to mosquitoes as temps have dropped. We couldn't go out and get a chair and enjoy the fall weather. Now dead. Smells good, too.
5 out of 5 stars
4 October, 2023
originally posted on stemforbugs
Works great!
[This review was collected as part of a promotion.] The packing to the Stem spay is great! Very please with the results with using it! Will purchase in the future when needed! #infuluenster #STEM
4 out of 5 stars
4 October, 2023
originally posted on stemforbugs
It works well!!
[This review was collected as part of a promotion.] well I used this Stem kills for 4th of July celebration and it really work well, it have some kind of strong smell but not bad at all.
4 out of 5 stars
4 October, 2023
originally posted on stemforbugs
It is ok
[This review was collected as part of a promotion.] It's not a bad product, but it's no a great one, it's just ok, I couldn't fin anything that says that you can use it inside the house with your dogs, so I got kinda scared, because I have 4. And also.. smells weird hahaha