Does Apple Cider Vinegar Kill Spiders

So, you found a spider in your sink. Again.

You’ve heard the gossip: apple cider vinegar, the magic potion of the internet, kills everything from weeds to existential dread. But does it actually work on the eight-legged freeloaders in your bathroom?

Let’s pour a cup of coffee (or ACV, if you’re brave) and dig in. Spoiler: it’s complicated.

The short answer: yes, but it’s a weird, messy yes.

Apple cider vinegar can kill a spider. But—and this is a big, hairy but—you have to get the spider swimming in it. Think a spider jacuzzi, but with a very unhappy ending.

If you spray a dilute mix of water and ACV, the spider might curl up its legs. Might. It’s more likely to just run away, annoyed that you wasted perfectly good salad dressing on its face.

The acidity is the problem. Apple cider vinegar is about 5% acetic acid. That’s not exactly battery acid, but to a tiny spider, it’s like being hit with a sour, low-grade pepper spray.

Let’s talk about direct contact.

To kill a spider, you need to soak it. A misty spray won’t cut it. You need a steady stream, like you’re putting out a small fire made of legs.

If you hit the spider with a full blast, the vinegar enters its breathing holes (spiracles—yes, that’s a real word). This essentially drowns it in acid. The spider suffocates, panics, and stops moving. Not a fun way to go, but effective.

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But here’s the kicker: most spiders are champs at holding their breath. They can survive being submerged in water for up to 24 hours. Vinegar speeds up the process, but you still need to be ruthless.

What about the smell? Or the leftover spider juice?

Oh, the smell! Your house will smell like a pickle factory threw up in a cider mill. Not the cozy fall vibe you were going for.

And then there’s the corpse. A dead spider floating in vinegar is not a pleasant sight. You’ll have to clean it up, probably while holding your nose and muttering, “Thanks, internet.”

Let’s be real: if you have a serious spider problem, this is like using a water pistol to fight a forest fire. It’s messy, smelly, and frankly, a little sad.

But wait—does it work as a repellent?

This is where the internet really gets carried away. The claim is that spiders hate the smell of ACV and will avoid it.

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Is that true? Maybe. Spiders are sensitive to strong smells (they’re basically tiny chemists). But they don’t hate the smell enough to pack their bags and move out.

Think of it like this: you don’t like the smell of burnt toast. But if you want to get into the kitchen, you’ll walk through burnt toast air. Spiders are the same. Hunger and survival beat a sour smell every time.

So, spraying a perimeter of ACV around your door? It’s a myth. You’ll just have a stinky door and a spider that takes a different route.

What should you do instead? (If you actually care)

If you want to repel spiders, do what experts do: seal cracks and remove webs. That’s 90% of the battle. Vinegar is the goofy, messy 10%.

Or, buy a $5 can of peppermint spray that actually smells nice. Spiders hate peppermint oil more than they hate vinegar, and your house won’t smell like a science experiment gone wrong.

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“But I don’t want to kill them!” I hear you. Good for you. Catching them in a cup and putting them outside works perfectly. No vinegar, no drama. You’re basically a spider Uber driver.

The final verdict (and a warning)

Apple cider vinegar can kill a spider—if you’re aggressive, accurate, and okay with your home smelling like a salad bar. But it’s not a magic solution.

Is it worth it? For a one-off spider in the sink? Maybe. For a full-blown infestation? Absolutely not. You’ll just end up annoyed, sticky, and running to the hardware store for real spider killer.

So next time you see a spider, ask yourself: Is my savior a bottle of tangy, fermented apple juice? Or is it a paper towel and a shoe? Be honest.

Or better yet, just name the spider. Pretty soon, you’ll be friends. And you won’t need the vinegar at all.

Cheers. Pass the coffee.