Slugs are basically 95% water and 5% spite. They thrive on moisture. So, you need to make your house feel like the Sahara Desert to them. Fix that leaky faucet under the sink. Get a dehumidifier for the basement or laundry room.
How to Get Rid of Slugs in Kitchens?
Think about your habits. Do you leave wet towels on the floor? Do you have a houseplant sitting in a saucer of water? Stop it. You are building a five-star spa for slime-balls. Dry = Dead (or at least, Dry = They leave).
Also, check your firewood pile if you keep it indoors. A single damp log can be a motel for a whole slug family reunion. Keep wood outside, far from the door.