I have a theory about this; spiders always make webs near a light source so as to attract insects at night, they must see a shiny mirror as a 'light'??
I've seen 'spider repellent' sprays in these cheap shops, maybe spray some of that?
Conversely, does anyone have a resident spider which they enjoy? I mean, if you think about it the spider gets to travel around and see all sorts of places
