They dont like lemon juice.......... smear round pots etc,
trouble is , it does need re-applying regularly, expensive.unless you have a lemon tree in garden!

so a good way for me to use up surplus lemons
My chickens won´t touch them.... I did see a video on you tube, about training your chooks to like them, by chopping the little blighters in half first ( the slugs.....not the chickens!),
but that doesnt appeal!
Now as and when I find some, I collect them and put them into the bin of nettle ( and other weeds) fertlizer!
Gonna try the copper idea, as I have some plastic covered washing line, which has broken.which is copper wire...... just need to strip the plastic off it all