I’ve lived in northern Maine for over 10 years and never seen a slug. This spring, summer and fall we have had rain here on the coast est. 80% of the time so I’m wondering if this is related to my slug problem. I went downstairs three days ago and there was a big slug on the kitchen floor in front of the sink; I thought it came in on a wagon I brought in the house so I disposed of it and that was that. However, yesterday, same thing. It is giving me the creeps and I feel like they are everywhere and I just can’t see them. I’m afraid to look under the sink where it is damp. I put salt around the edges of the floor in front of the sink. I live by myself and I’m old, unfortunately, and I have no one to help me. boo hoo. anyway, where could these things be coming from. The only food is the garbage can under the counter by the sink. Do slugs go after garbage? I just can’t figure out why, after all these years, they are in the house. Any slug experts out there? 
In the garden, I’ve put out foil pie pans with beer in them. Slugs go in and drown. But I’ve never seen a slug indoors.
There is a commercial product called Corry’s that works great at getting rid of slugs in gardens. It’s a coarse, sawdust-like powder that comes in box. If you can follow a slime trail and find where they are coming in at, I would try Corry’s outside. I’ve never heard of or seen them in a house; you might want to ask at a nursery or garden center if they have any recommendations.
I’ve heard the beer trick from other people, too.
At least use a good quality beer so they don’t die in agony in Bud Light or some other abomination.
Catch them and make elaborate mazes of salt.
Get some Iron Phosphate slug bait, e.g. Sluggo. It’s supposed to be non-toxic, although this page raises some concerns if pets eat it. If you have pets, make sure they can’t get to it.
ETA: It seems to be iron toxicity in dogs, which is a function of how much iron is ingested, not because Iron is toxic.
Is that some kind o kid-torturing-insect thing? The slug dehydrates itself by going through it?
When it rains, slugs need to find some kind of high ground or they might drown. So you’ll often see more of them during wet weather. I’ve never seen one inside a house, and I think I’d start addressing this problem by figuring out how they get in - can you follow the slime trail back? If there’s a gap where slugs can get in, there are many reasons to seal it up.
As for getting rid of slugs, I feel compelled to suggest “Just shoot them” (Yes, pun intended 
)
More seriously, Sluggo has always worked well for me in gardens. If you sprinkle a little all the way around your house, that may help.
After the first two I haven’t seen anymore. I did sprinkle salt under the sink (with my eyes closed). I googled this and it seems that having slugs in the house is not uncommon. Just talking about it is giving me this awful feeling. I’m not a gardener so I’ve never come in contact with slugs except years ago when I lived on the Russian River in CA. Every year they have a slug fest and actually eat them. Okay, I’m getting cold chills in my chest.
We live in Portsmouth on the South Coast of England. It’s a city on an island and much of the ground was originally marsh. It has to be slug central for the UK. We find them in the scullery (often), in the kitchen (occasionally) and even from time to time in the front parlour. You walk in in the morning and you can see the slug trail on the carpet. I caught one of the damn things in there once when I came down for something at about 2am. The problem is much worse in wet weather.
Oh and another attraction. According to the local press you’re never more than 3 feet away from a rat wherever you live in Portsmouth.
Be forewarned that dead slugs ruin the taste of the beer. 
I disagree. Don’t waste good beer on slugs, they don’t deserve anything but the cheap stuff! :).
That doesn’t work for me, since I haven’t been able to hire out of work slugs to pass around fliers telling the other slugs to come to the beer. Maybe a beer moat would have worked, if I had enough beer.
We have more snails than slugs, and use Sluggo - which has never been a problem for our dogs. Some times when the garden is in I go out with a flashlight and crunch the snails - got over 50 some nights. It is better now that our neighbor and I built a Berlin Wall without places for the snails to get through.