A chipmunk has taken up residence in my basement. He is undeterred by the fact that I have cats, and they have no interest in catching him. He is able to get the bait out of a havahart trap without triggering it. I would rather use a pest company as a very last resort, so are there some good nontoxic sprays or deterrents I could use? Everything I can find online is about keeping them out of the garden, which is of no use in the US northeast in November. Any ideas?