There is a skunk living under our deck because one night we were waken by this nasty strong smell. Initially I thought it is some wiring fault somewhere but the smell is different. It came from the crawl space but I couldn’t find anything wrong. Next day, we saw a skunk running under the deck, despite me shouting and protesting. So we boiled a mixture of black and cayenne pepper, strained through cheesecloth when it is cooled down. Then I sprayed it under the deck. After this I stapled chicken wire around the deck, also leaving 2″ extra on the ground to prevent digging. I purposedly left a small hole and cover with waddle newspaper. After a couple of days the newspaper is unmoved so I know the skunk has left. I then covered the hole with chicken wire as well. Sure enough the smell is gone now but it is a smell that I would never forget!