Salt Gun for Mosquitoes, Spiders and Roaches: What Works and What Doesn’t
Last updated: October 28, 2026
A salt gun works well on mosquitoes, works on small spiders if you get close, and is a poor choice for cockroaches. The rule is simple: the softer and smaller the bug, the better a pump-action salt gun does. Hard shells shrug off a pinch of salt.
| Pest | Verdict | Best distance | Better long-term fix |
|---|---|---|---|
| Mosquitoes | Works | 1 to 3 feet | Remove standing water, use screens |
| Small house spiders | Works | 1 to 2 feet | Vacuum webs, seal gaps |
| Large spiders | Limited | Close, with a follow-up | Vacuum or a glue trap |
| Cockroaches | Poor | Not recommended | Baits and sanitation |
Does a salt gun kill mosquitoes?
Yes. A mosquito is light and soft-bodied, so a hit from 1 to 3 feet usually drops it. Owners describe salt guns as effective on mosquitoes; the hard part is seeing them. That is where a laser sight helps: put the dot on a mosquito resting on a wall and you will hit far more often.
How to hunt mosquitoes with a salt gun
- Look on walls, ceilings and curtains near where you sleep or sit; mosquitoes rest after flying.
- Use a torch or room light at a low angle so the mosquito casts a shadow.
- Move in slowly to 1 to 3 feet and fire at a slight angle to the wall.
- Wipe the spot afterwards: a mosquito that has just fed can leave a small blood mark.
Stop mosquitoes at the source
Only female mosquitoes bite, and they need water to lay eggs. According to Purdue University Extension, the full cycle from egg to adult can take as little as 10 days in warm weather, in anything that holds water: buckets, tyres, gutters, bird baths and pool covers.
- Empty anything that holds water at least once a week.
- Keep gutters clear.
- Change bird bath and pet water once or twice a week.
- Keep window and door screens tight.
A salt gun handles the few that get inside. Removing standing water stops the next batch.
Does a salt gun kill spiders?
Small house spiders, yes, if you get within 1 to 2 feet. Larger spiders often survive a single shot and need a quick follow-up, so have a vacuum or a jar ready. Owners report decent results on small and medium spiders and mixed results on big ones.
Before you shoot, it helps to know that most house spiders are harmless. The University of Kentucky notes that most spiders are beneficial because they eat flies and other pests, and that only the black widow and brown recluse are a real concern in most of the US. Do not try to tackle a suspected widow or recluse infestation with a salt gun; call a professional.
Keep spiders out for good
- Vacuum webs and egg sacs regularly; one egg sac can hold hundreds of young spiders.
- Seal gaps around doors and windows and fit door sweeps.
- Move firewood and clutter away from the house.
- Use yellow or sodium outdoor bulbs, which attract fewer of the insects spiders feed on.
Does a salt gun kill cockroaches?
Not reliably. Cockroaches have tough bodies, hide in cracks and are fast. Owners report needing several shots for a single roach, and a salt gun does nothing about the ones you cannot see.
For German cockroaches, the common indoor pest, NC State University recommends baits, which are highly effective when placed as small spots along walls in kitchens and bathrooms, combined with sanitation: clean dishes, sealed food, trash out promptly and leaks fixed. Results can take a couple of weeks.
Bottom line on roaches: use baits and cleaning for roaches, and keep your salt gun for flies and mosquitoes.
What about other bugs?
| Bug | Verdict |
|---|---|
| House flies, horse flies, deer flies | Works; the main job of a salt gun |
| Moths | Works |
| Fruit flies and gnats | Limited; too small; a vinegar trap does more |
| Stink bugs and beetles | Limited; hard shells |
| Wasps, yellow jackets, hornets | Not recommended; often only angers them |
| Honeybees | Never; leave pollinators alone |
Which salt gun is best for mosquitoes and spiders?
A model with a laser sight makes small targets much easier. The Bug-A-Buster 2.0 Laser and every Bug-A-Buster 3.0 come with an under-barrel laser. See all models on the Salt Guns page, or read our guide to choosing the best salt gun.
FAQ
Can a salt gun kill a mosquito?
Yes. Mosquitoes are light and soft, so a hit from 1 to 3 feet usually drops them. A laser sight makes them much easier to hit.
Will a salt gun kill a spider?
Small spiders, usually yes, from 1 to 2 feet. Large spiders often need a second shot or a follow-up with a vacuum.
Does a salt gun work on cockroaches?
Not reliably. Roaches are tough and hide in cracks. Baits and good sanitation work far better for cockroaches.
Is it safe to shoot a black widow with a salt gun?
It is not a good idea to provoke a potentially dangerous spider. Keep your distance and call a pest professional for black widows or brown recluses.
Do I need a laser to hit mosquitoes?
It is not essential, but it helps a lot. Mosquitoes are small and hard to see, and the laser dot shows where the shot will land.
More salt gun guides
- Best salt gun for flies (2026 buying guide)
- What is a salt gun?
- Does salt kill flies?
- Best salt for a salt gun
- Salt gun vs bug zapper vs electric swatter
- Is a salt gun safe?
