We used the irish spring when I was young to keep mice out of long term storage but discovered too late that it didn't work in a trunk that had a hole where the lock would be---they destroyed some antique plush toys. Between the trunk and the soap one wouldn't have expected them to find their way in.
I always heard peppermint repels mice, not spiders, but have my doubts since peppermint candies blew out the m/c exhaust pipes after a winter of sitting one year---after that covers were put on the exhaust for the winter.
All the uses for dryer sheets came about after I had to go all natural on everything because otherwise my breathing is affected. Along those lines moth balls have always given me headaches and are hazardous to humans as well as the other animals.
So, even if someone comes up with something smelly that works
, I'll still need to find alternatives. So, the search continues.
Maybe a repeating tape of predator sounds under the hood? :dodgy: Not really serious about that one.