See images. Slugs somehow getting into kitchen via gap between skirting and plinth. I know there coming in from outside, but I want to take a look behind plinth.
its worth mentioning slugs start around the size off a grain off rice and can grow on little more than paper as a food source so dont look for say 12mm gaps look for 2mm or possibly smaller and dont use paper to fill as its an apéritif to the slimy ones
as an aside
i left an empty pringles tube in the garden over winter under my bench on its side [unknowingly blown under]and when i found it next summer it was no more than a tin base foil tube and a plastic cap that had fallen to the ground but complete and a bit deformed