As you can see by my user name, I’m not a fan of slugs in houses! I’ve had them in my kitchen and also in my downstairs bedroom ( bungalow) and had to treat them differently.
I consider myself an expert in the different methods! Some advice;
Do not leave salt lines touching your skirting boards for several weeks, the salt reacts with them and causes the paint to bubble and eventually ruins the wood! I had to have the skirting boards replaced.
Do not put salt on the bottom of the doorframe, it rusts the metal fixings!
Copper tape does not stop slugs, I have seen them nonchalantly marching over it! Very finely crushed egg shells are better but make sure you clean them thoroughly as otherwise they stink after a while.
In my bedroom last year, I was getting several tiny baby slugs every night squeezing between the edge of the skirting board and the floor boards. I have a 5 ft space underneath my bungalow designed to take any surplus ground water as the estate was built on low lying farm land - the buildings are not damp because of this drainage feature! I realised I needed to do something drastic to be able to sleep in my bed!
So, after trying copper tape, I went on Amazon and got a solution of natural scents to make into a spray with water and sprayed this along the gap every evening - it stank awfully but needs must! I also squished copper mesh down into the gap between the carpet and skirting board then laid a layer of crushed egg shells along it. I slept with a side lamp shining on the floor like a prison camp search light! I removed any I saw and they were disposed of - not in a humane way I’m afraid.
Fortunately after a few weeks, the snail parade stopped, and I have not seen any little critters this year, the copper mesh and egg shells are still in situ, not a pretty sight, but I’m thinking of hoovering it up in a few months. After extensive research of the life cycle of slugs, I think that an adult slug got into my floor space and laid eggs there, apparently hundreds of them at a time! As they hatched, babies began exploring and some ended up in my bedroom! I’m just hoping that as I have not seen any babies this year that slugs are not like frogs and do not return to the same place each year to breed!