Last year I used conkers ( yes I know it’s an old wives tale} to deter spiders in the house. It worked as only one all winter and usually huge garden spiders scuttle around up and downstairs. They are so big I swear I can hear them breathing! This autumn I can’t get any conkers as too far away from trees. My question are horse chestnuts similar and would they work?
Wicked Little Letters? (funny film of a long-forgotten case)