STEM Flying Insect and Mosquito Killer Bug Spray - 10oz
$7.29
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Guests are saying
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)
4.0 out of 5 stars with 57 reviews
quality: 2.75 out of 5
value: 2.75 out of 5
52% would recommend
19 recommendations
5 out of 5 stars
22 March, 2026Verified purchase
(no review title)
Had a plethora of flies and this spray got rid of most of them in one night. Thought I was going to need an exterminator but this did the job. If you spray on the floor you do need be careful because it can get slippery.
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 - 2 months 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 - 8 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 - 10 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!
1 out of 5 stars
Thumbs down graphic, would not recommend
13 September, 2023Verified purchase
Save your money elsewhere
I had high hope because I like other items in this brand. This one sadly did not add up.. The smell was horrible, the effectiveness was just not worth the price..
1 reply from stem Team team - 3 years ago
We're sorry to hear you weren't a fan! Since STEM® is made with essential oils, this product has a stronger aroma. After use, the fragrance typically fades away within a few hours; if sprayed heavily, it may last longer. To quickly eliminate the scent, be sure to ventilate the area and clean surfaces with warm, soapy water. Call us at 877-869-7546 (M-F 8 AM to 5 PM CT) if we may be of additional help, and be sure to provide your reference number: 22149206. Chat soon! -Alyssa, SC Johnson Consumer Care
1 out of 5 stars
Thumbs down graphic, would not recommend
8 August, 2023
Dont waste your time
Did the makers even test this product out for themselves? This literally doesn’t work . NONE OF THEIR STUFF WORKS tbh .. waste of money + frustration.
1 reply from stem Team team - 3 years ago
We're so sorry to hear this product didn't perform as we'd expect it to! Typically this product is very effective when spraying insects directly. Since this is not the case, please reach out to us at 877-869-7546, weekdays, 8 AM to 5 PM CT. Your reference number is 22118572. Chat soon! -Alyssa, STEM Consumer Care
5 out of 5 stars
Thumbs up graphic, would recommend
6 May, 2023Verified purchase
Magic formula for gnats
Worked just as well as its counterpart, while I used the liquid to sit on the counter. The spray was used in the beginning to kill the gnats in the heavily populated areas.
5 out of 5 stars
Thumbs up graphic, would recommend
2 October, 2022Verified purchase
Very helpful with flies and spiders!
I purchased this STEM insect killer aerosol spray as we are doing a remodel on a 100 year old home and as we are peeling up layers of walls and flooring, we’ve found spiders everywhere! This spray works great when you are able to spray directly onto the bug, and it seems like almost immediately (sometimes takes a few sprays) start to struggle and die. Also have found it works great on flies!!
5 out of 5 stars
Thumbs up graphic, would recommend
10 September, 2022Verified purchase
Like Magic It Works So Quickly
I can't believe how quickly this stuff works. After trying it out in our motorhome, I bought a second bottle for the house.
1 out of 5 stars
Thumbs down graphic, would not recommend
22 July, 2022Verified purchase
Rash after skin contact
Daughter has Rash after skin contact and it makes huge mess on windows or wherever you spray it BUYER BEWARE
4 out of 5 stars
Thumbs up graphic, would recommend
21 July, 2022Verified purchase
Great, but smells
Has a pretty strong smell but it’s not as strong as the Raid or Stem sprays. Definitely effective!
5 out of 5 stars
Thumbs up graphic, would recommend
9 July, 2022
Gnats be gone
I was fighting gnats… Nothing worked until I got this!
1 out of 5 stars
Thumbs down graphic, would not recommend
8 July, 2022
Flying through the spray
The bug is still flying even after being sprayed haha it did nothing to it
1 reply from stem Team team - 3 years ago
We're so sorry to hear this product didn't perform as we'd expect it to! As long as you are spraying the flies directly it should kill them instantly. As this didn't meet our expectations, we'd like the chance to help. When you can, please give us a call at 877-869-7546 (Monday through Friday 8 AM to 5 PM CT) and provide reference number 020931705A. We look forward to hearing from you! – Rachel, STEM Consumer Care
5 out of 5 stars
Thumbs up graphic, would recommend
7 July, 2022
Great Item
It works very quickly to clear the flies from under the gazebo. The smell is a little offensive, but quickly disappears.
1 out of 5 stars
Thumbs down graphic, would not recommend
27 June, 2022
Oily residue
Leaves oily residue everywhere. If you don’t have carpet I don’t recommend leaves floor extremely slippery
1 reply from stem Team team - 3 years ago
Thanks for reaching out. Due to the essential oils in this product, it tends to leave an oily residue. After use, we recommend cleaning surfaces with warm and soapy water. We'd expect this to remove any oily residue from your surfaces. If you'd like to discuss this further, please give us a call at 877-869-7546 (weekdays 8 AM to 5 PM CT). Your reference number is 020931686A. Have a great day! – Rachel, STEM Consumer Care
1 out of 5 stars
Thumbs down graphic, would not recommend
17 June, 2022
Not helpful.
Product may be okay but I wouldn’t know. The nozzle/sprayer is the most ridiculous thing I’ve ever tried to use. Maybe I received a defective one, I’m not sure, but will be returning.
5 out of 5 stars
Thumbs up graphic, would recommend
29 April, 2022Verified purchase
Game Changer for Gnat Issue
I have tried multiple products for Gnat issue because I have a lot of indoor plants. These bugs were taking over my house. I even tried home remedies and nothing worked. Bit this spray was a game changer. All the gnats died instantaneously. Another thing that I love about this product is that it’s safe to use around kids and it smells great. But I wish that it was a little cheaper because you so little for the price.