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STEM 12 oz aerosol insect killer bug spray can, kills flies, mosquitoes and gnats
STEM insect killer bug spray bottle held near a dog
Insect killer bug spray for indoor and outdoor use
STEM insect killer bug spray bottle with botanical extracts label
STEM insect killer product pack showing 12 oz aerosol and flying insect traps
STEM insect killer bug spray with logo near people relaxing on a couch
STEM 12 oz aerosol insect killer bug spray canister with safety label
STEM 12 oz aerosol insect killer bug spray can, kills flies, mosquitoes and gnats
STEM insect killer bug spray bottle held near a dog
Insect killer bug spray for indoor and outdoor use
STEM insect killer bug spray bottle with botanical extracts label
STEM insect killer product pack showing 12 oz aerosol and flying insect traps
STEM insect killer bug spray with logo near people relaxing on a couch
STEM 12 oz aerosol insect killer bug spray canister with safety label

STEM Kills Indoor & Outdoor Fly, Mosquito & Gnat Insect Killer Bug Spray Value Size, 12 oz

$13.34 $33.63( / )
Shipping Free.
STEM Flying Insect Killer is a bug spray made with botanical extracts that are deadly for bugs. STEM's scientists decode the power of nature to protect your family safely* from pests. STEM plant-based active ingredient bug spray kills flies, mosquitoes, and gnats. This insecticide has no added dye, fragrance, or...
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STEM Flying Insect Killer is a bug spray made with botanical extracts that are deadly for bugs. STEM's scientists decode the power of nature to protect your family safely* from pests. STEM plant-based active ingredient bug spray kills flies, mosquitoes, and gnats. This insecticide has no added dye, fragrance, or harsh chemical odors, and is made using natural ingredients for indoor and outdoor use to make any space a bug-free zone. STEM's flying insect killer spray is safe for use around kids and pets* and is tested by entomologists. Rooted in Nature, Optimized by Science. *When used as directed.
  • Essential oil-made natural bug spray kills annoying flying insects including flies, mosquitoes, and gnats
  • With plant-based active ingredients, this natural insecticide is safe for use around kids and pets (when used as directed)
  • Enjoy the feel-good benefits of this botanical insect killer with a fresh scent and no added dye, fragrance, or harsh chemical odors
  • Entomologist-tested fly, gnat, and mosquito pesticide for home or wherever pests could be pestering you and your family
  • Developed using geraniol and lemongrass, two neurotoxic essential oils that affect the nervous system of flies, mosquitos, and gnats

🚚 Free Shipping & 30-Day Free Returns

Enjoy Free Standard Shipping across the USA and 100% Free 30-Day Returns with zero restocking fees.

📦 Shipping Policy

  • Target Destination: We ship exclusively to physical addresses within the 50 United States.

  • Order Processing (Handling Time): 0 to 3 business days (Mon – Fri). Orders placed after 5:00 PM ET or on weekends begin processing the next business day.

  • Transit Time: 0 to 3 business days (Mon – Fri).

  • Total Estimated Delivery: 1 to 6 business days.

  • Tracking: A tracking number will be emailed to you as soon as your order ships.

🔄 Return & Refund Policy

  • 30-Day Return Window: Items can be returned within 30 days of delivery.

  • 100% Free Returns: We provide a prepaid return shipping label for all eligible returns (including customer remorse, wrong size, or defective items).

  • Zero Restocking Fees: We do not charge any restocking or return fees.

  • Item Condition: Must be new, unused, and in original packaging with all accessories included.

  • Fast Refunds: Once inspected at our warehouse, your full refund is processed back to your original payment method within 7 business days.

⚠️ Damaged or Incorrect Orders?

If your item arrives damaged, defective, or incorrect, please notify us within 48 hours of delivery with photos of the item and packaging so we can expedite a free replacement or instant full refund.

📩 How to Start a Return or Inquiry

Returns are accepted by mail with prior authorization. Contact our customer care team with your order number: