Another useful approach is to cut down on indoor humidity. Slugs thrive in moist environments, so running a dehumidifier or boosting air circulation can make your home much less inviting. Wipe down damp surfaces regularly, especially in bathrooms, laundry rooms, and kitchens.
You can also try natural repellents. Sprinkling salt, diatomaceous earth, or crushed eggshells along known access points creates barriers that slugs are reluctant to cross. And if you happen to find one inside? Simply move it outdoors, well away from your house—or if you’re feeling bold, set out a shallow container of beer to trap them overnight. It’s not fancy, but it gets the job done.
Tried these basic fixes and still dealing with slugs? On the next page, we’ll reveal the best trick.
Some slug issues are more stubborn, especially if your home is surrounded by damp soil or thick gardens. When sealing and drying out aren’t enough, it’s time to level up with more focused solutions.
One highly effective and lesser-known deterrent is copper wire. Slugs despise crossing copper—the reaction between their slimy bodies and the metal delivers a mild electric shock. You can attach strips of copper tape or wire around entry points like doors, pipes, and even baseboards. For even stronger results, some people run a very low electrical current through the wire using a safe, battery-powered setup. It poses no danger to humans or pets, but it creates an uncomfortable barrier slugs won’t cross.
Another powerful method involves introducing natural slug parasites into your garden. These are microscopic nematodes—tiny organisms that live in soil and infect slugs with bacteria, causing them to stop feeding and eventually die. They’re safe for pets, people, and other wildlife, and they’re simple to apply by just watering them into the ground. If slugs are slipping in from outside, reducing their numbers at the source can make a huge difference.
