Phisherman wrote:
For some reason there are a LOT of spiders this year, inside and
outside the house. Anyone know how those plug-in high-frequency
devices work? I suspect these are a hoax but I have seen these kits
in the stores for many years.

I have several of them in the garage and in the house. They don't keep
away spiders or mice but I have not seen an elephant since they were
plugged in.