We were living together so before I sent him back the keys, I paid a visit to the nearest pet store.  There I bought about 2 crates of feeder crickets.  I let them loose in the house. Try sleeping at night to about 80 crickets making that sound, not knowing where they are!

http://www.revengelady.com/top_ten_stories.html
http://www.revengelady.com/top_ten_stories.html
http://www.revengelady.com/top_ten_stories.html