Slugs are basically 90% water and 10% bad decisions. They thrive in damp, dark places. So, if you want to ruin their parade, focus on drying things out. Fix that leaky tap, wipe down the sink after you wash dishes, and don’t leave wet towels on the floor. It’s like telling them, “Sorry, the spa is closed.”
Also, check your plant pots and potted herbs near the back door. Slugs love hiding under the rim of a pot. I found one nesting under my basil once—I felt betrayed. Move pots a few inches away from the wall, and water them in the morning so the soil dries out by nightfall.