Bacon
I'm still here! It's the most interesting thread I've read since the infamous cat shit one!
I'm not aware of any tbh, but it's not something I've ever looked into. Even though I'm a licensed pest controller!!
Chestnuts? Can't imagine that would work and I'm not aware of any plug in or sonic devices that would deter spiders.
Movement/vibration is probably the answer but there's only so much of that you can realistically create. What kind of house do you live in? Have you ever been up the attic? That's where they hang out year round. And also behind things that rarely get moved (TV, fridge etc) so if you really dislike them and can't put up with them I'd suggest evicting from those places first. But they will come in again anyway, you have to open doors and windows at some point.
It's just a fact of life really, they will come in if they aren't already (some species aren't allowed to live at "home" forever, in fact most of them don't) so they have to move house. Once they're in they're in.
But do be reassured they are harmless, as I've already stated.
I live in a fairly large house (not huge but not tiny) out in the sticks and it's only autumn I really see them even here.