Karlsten Bug & Insect Destroyer: Flea Killer Spray

Bought this few times now, very helpful to cope with the fear

After extensive research on bed bug treatments, I can confidently say that the effectiveness of any product depends on your preparation. Simply spraying a little on your mattress won’t cut it—you need to remove all clothes from cupboards, spray inside them, treat cracks in the floor, the entire mattress, and all parts of the bed frame. However, the bugs can be hiding anywhere and are attracted to the carbon dioxide, so just because you don't see them, doesn't mean they are gone. The pests can hibernate for 6 months without food so it is a pain. This Bed Bug Spray does kill on contact and provides some lasting protection, but if you have a heavy infestation, one bottle won’t be enough. In my case, I had a smaller bedroom with a single bed that was heavily infested, and even with professional-grade treatments like Provecta, C40 WP, and Cimetrol RFU, it still took several applications over multiple visits to fully resolve the issue. While this is a good starting point for minor infestations or preventative treatment, you’ll need several bottles for anything more serious. By the time you buy multiple bottles, you might be better off investing in professional treatment. That’s the main reason I’m giving this 4 stars instead of 5—it works, but it’s pricey for the amount you’ll likely need. Overall, a good product, but be prepared to invest in multiple applications for best results. I also contacted the helpdesk to confirm I could spray this on the mattress and they confirmed, their customer support was very responsive and helpful.

It doesn’t kill giant spider’s immediately but it will eventually. It makes them uncomfortable enough to move so you can catch them and put them outside. Have sprayed under floor vents and potential entrances from outside. Have reduced giant spiders to nothing within 10 days. Before using this spray I had maybe four giant spiders in the house scurrying across the living room floor and kitchen ceiling each night. After spraying entrance zones inc doorways, wall vents and room corners, after a few days the spiders disappeared. I think for large spiders this spray is a huge deterrent rather than something that kills them. I personally do not like killing spiders and before this spray, I tried to remove each spider but this wasn’t effective. Highly recommend spray. Allow a few days for results.

Sprayed it directly on a spider and saw it die, the product itself is good. But the bottle is very defective. The spray nozzle wasn’t working even though it was “open” nothing would come out for a while. Not to mention Yoon that it drips a lot while spraying

We had a spider problem outside our door which has now been eliminated thanks to this spray! Both my girlfriend and I are arachnophobes, so the bottle is welcome as it doesn't show a full-res picture of a giant spider on it lol. Fast-acting, doesn't smell terrible and leaves the area unappealing for spiders for quite a while!

Crap. Used once with good effect. Went to use tonight 3 weeks later. Trigger has failed. So a big giant spider loose in my house. Pathetic and a waste of money

Works wonders five stars from me!

I used this on my outside balcony after destroying eight spider webs with a duster. Before buying this chemical, the spider kept coming back like a bad tenant. After I sprayed, it didn’t even attempt “Web No. 9.” Instead of packing up and moving to my neighbour’s place (spiders aren’t great at taking hints), it just relocated a few meters away. It made two tiny webs—each only about a fifth the size of a normal one—before giving up entirely. The chemical is pungent. Even on a windy balcony on the 10th floor, I could still catch a whiff of it. For those giving this product one star: you’re probably spraying it like hair lacquer. That’s not how to use it. You need conviction. I used about a third of the bottle on my balcony’s target areas. Spiders are stubborn, so you have to declare full-on war to make any progress. I assume a direct hit could kill a spider, but it also works as a deterrent when you can’t find the critter. My advice: buy three bottles, go in strong, and maybe just maybe—the spider will finally pack its bags and move to your neighbour’s house.