STEM Kills Flies Mosquitoes and Gnats Bug Spray Killer, Mosquito Bug Spray, 10 oz. price history and forecast - Stem 346603
STEM Kills Flies Mosquitoes and Gnats Bug Spray Killer, Mosquito Bug Spray, 10 oz.

STEM Kills Flies Mosquitoes and Gnats Bug Spray Killer, Mosquito Bug Spray, 10 oz.

Brand:
Stem
Model Number:
346603
UPC:
046500041044
EAN:
0046500041044
Walmart SKU:
1229492393
Key Takeaway

Trending downward with a $1.06 move today to reach $5.92. Current price runs 15.7% below the 90-day average.

Third-Party Seller Summary

Third-Party Seller Price History Summary
Price Type Price Date
Highest Price
$19.75
Lowest Price
$16.98
Most Recent Price
$19.75
Average Price
$19.06
First Tracked
Last Update

Walmart.com Summary

Walmart.com Price History Summary
Price Type Price Date
Highest Price
$7.28
Lowest Price
$4.99
Most Recent Price
$5.92
Average Price
$7.14
First Tracked
Last Update

Price Analysis

Tracking History: We have tracked STEM Kills Flies Mosquitoes and Gnats Bug Spray Killer, Mosquito Bug Spray, 10 oz. since 9/17/2023. The most recent price update was on Nov 9, 2026.

Price Range: Over the past 90 days, the price has ranged from $4.99 (lowest on 9/17/2023) to $7.28 (highest on 9/30/2025). The average price during this period is $7.14.

Current Trend: Walmart.com prices have ranged from $5.92 (Nov 9) to $7.28 (Oct 16) over the past 90 days. Current price is 15.7% below the 90-day average of $7.03.

Customer Insights: Rated 4.0/5 from 1600 reviews.

Customer Reviews

1600 reviews

Customer Reviews

4.0
Based on 1600 reviews
5
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Showing 10 of 1600 reviews

Like Magic

Deborah September 20, 2026

Oh my goodness! For the first time in 16 years I had an infestation of drain flies. I mean, before it was over, it was thousands. I used a different product along with every hack on the Internet and I used the fly swatter like I was John Wick and still every morning for nearly 3 weeks there would be more and more. It was embarrassing and frustrating! I needed something that was safe for pets. This product, STEM, cleared 99% of them within two days!! It was like magic! Yes, it's oily, but not that awful, takes very little, and I don't spray where it gets on the floor. I wipe everything down in the morning (cuz there are a lot of dead flies) I highly recommend.

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The best way to kill'em

Rosemarie September 20, 2026

I've actually killed flies in mid flight. That's the best time to get them. When they land they catch a bit of your shadow and they're off. Not with Stem You catch them in mid air and they have no clue what they're in for. They're in for STEM

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Regina July 9, 2026

I love how kills on contact but it needs to come in larger bottles so it is economical in quantity. I'm willing to buy a larger bottle for the inside an outside. Can it be used directly on inside and outside plants? Very good product. I haven't seen a gnat in any area I sprayed.

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anonymous August 28, 2026

it's the best product for what I need it for so many flies! the only problem is it's so greasy and it stays on your walls. but I guess considering it works and it's safe for all my cats I can't complain. it's the best I found so far.

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product plant based, safe for pets/humans

renee September 3, 2026

It's time purchase and anew tiny flying insect suddenly appeared. Works great. Sprayed lightly one time when purchased about 2 weeks ago and again this morning very, very light spray.

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Christan September 30, 2026

I suppose overall it does kill fruit flies. BUT it leaves an awful film on everything. It never dries and takes a lot of effort to clean it up, like an oil. Its so hard to use and i regret every dollar I spent. You have to spray the insect directly, totally impractical.

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Terrible! Coats everything in a oil substance!

Pamela October 12, 2025

This is a terrible product! Following directions, I sprayed lightly in the air at the insects. It does not spray a light mist. It spreads a coat of oil and falls down on everything. Directions even say to wipe up and then use soap and water to remove. It also says it could stain. Anything within the line spray and all the way down has to be washed. Warnings say it will make floors slippery. It does, and now I have to wash my floor with soap and water to get it off. You can see what the surfaces look like in the picture. That doesn't dry and go away. It stays until you clean it off ....and since it is oily, it needs an oil remover. I am shocked at all the work and mess it created from a couple sprays. This needs to be taken off the market.

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useless, not recommended

Happy September 16, 2026

I bought this for gnats. it's basically useless because you can't spray it into the air. The instructions say wait till the net lands. yeah right like that's going to work! Makes your floors dangerously slick. warning say it may stain your furniture and etc. useless. not recommended

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Package and poison

Gina July 26, 2025

These two items were packaged together in an envelope First, it is a poison and a food product, which should never have been packaged together I understand making fewer shipments, but these items should have been packaged separately

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Horrible - Don't Buy!

Bri July 8, 2026

I bought this because I came home after being out of town for two weeks to a kitchen full of gnats (my fault for forgetting to take the trash out). Since it claims to be safe for use around pets and children, I figured it would be worth trying. I was really disappointed. First, the smell is awful. It has a strong chemical odor that quickly spreads throughout the house and lingers for hours. Second, it doesn't kill bugs on contact like you'd expect. As soon as you start spraying, it just sends the gnats flying everywhere, making the problem feel even worse because they scatter instead of dying. To top it off, it leaves behind an oily residue that's difficult to wipe off surfaces. Between the smell, the mess, and how poorly it worked on the gnats, I wouldn't buy this again.

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Price History

Historical price data graph for STEM Kills Flies Mosquitoes and Gnats Bug Spray Killer, Mosquito Bug Spray, 10 oz.

Recent Price Changes

Detailed price history for the past 90 days

Walmart.com Pricing

52 records

Walmart.com prices have ranged from $5.92 (Nov 9) to $7.28 (Oct 16) over the past 90 days. Current price is 15.7% below the 90-day average of $7.03.

Walmart.com price history for STEM Kills Flies Mosquitoes and Gnats Bug Spray Killer, Mosquito Bug Spray, 10 oz. showing recent price changes over the past 90 days
Date Price Change % Change
$5.92 $-1.06 -15.2%
$6.98 $+0.00 +0.0%
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$6.98 $-0.30 -4.1%
$7.28 $+0.00 +0.0%
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$7.28 $+0.92 +14.5%
$6.36 $+0.00 +0.0%
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$6.36 $-0.01 -0.2%
$6.37 $+0.00 +0.0%
$6.37 — —

Third-Party Seller Pricing

3 records

Third-Party Sellers prices have ranged from $19.75 (Aug 18) to $19.75 (Aug 18) over the past 90 days. Current price is close to the 90-day average of $19.75.

Third-party seller price history for STEM Kills Flies Mosquitoes and Gnats Bug Spray Killer, Mosquito Bug Spray, 10 oz. showing recent price changes
Date Price Change % Change
$19.75 $+0.00 +0.0%
$19.75 $+0.00 +0.0%
$19.75 — —

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