Slugs love damp, dark places because they are basically anxious jelly beans with feet. Check your doorways, windowsills, and any cracks near the foundation. If you can slide a piece of paper under your door, a slug can definitely squeeze through.
Fix leaky pipes, especially under the sink. That tiny drip is a watering hole for slug-kind. Also, don’t leave pet food out overnight—you’re hosting a midnight buffet for pests, not just your cat.
Pro tip: Buy a door sweep. It’s a cheap strip of rubber that blocks the gap. Slugs hate a tight squeeze. It’s like making them wear skinny jeans for eternity.