@Wearywithteens I pride myself on being fairly practical most of the time but also a lot of weird "woo" has happened in my life - within the last year I've heard horsemen behind me in broad daylight at Bosworth Battlefield when there was no one about, and within the last week I've encountered particularly weird patches of mist on country roads as well as a presence in a friend's house that is not friendly. I now need to work out what to do about the last one as I usually live a long way away from her so I can't just go in there and ask it to leave nicely with a bit of persuasion like I would if it was in my own house. There are lots of other examples from throughout my entire life. Lots of the time it has just been "feelings" but in the last three or four years (since the menopause) I've started hearing things and occasionally seeing things too. And no, it's not my imagination: they have often occurred in the presence of others, who have also seen or heard them too.
As a consequence one of my areas of interest is what used to be described as the occult. As you can now pretty much find a New Age shop wherever you are dealing in these sort of books and items now, it's much less occult than it used to be.
Anyway, salt. One of the ways to cleanse a room is to sprinkle a bit of salt in each corner (ideally rock or sea salt). If you want to go the whole hog, as it were, you can use something to represent all of the four elements - salt representing earth, incense representing air, a candle representing fire, and water that has had the Lord's Prayer said over it [or equivalent, depending on your beliefs] representing water. If you are able to get hold of Chalice Well water or blessed water or similar that can also work. I always like to do this if I move somewhere new. I also studied both massage and Reiki and will sometimes use the Reiki symbols to clear and/or protect a room or space, or myself. Whether it actually works or not can't be scientifically proven with the instruments we currently have at our disposal, but then once upon a time electricity seemed like witchcraft. And what it does do is settle me down.
Anyway, when it comes to salt, things inside a circle of salt should be more protected, psychically, than things outside the circle. Rock salt or sea salt are best, but in a pinch, table salt will do....