In my workshop I cleared all the spiders away ( ok ok I got my partner to evict them, I admit) then installed the ultrasonic mouse repeller plug I got off Ebay, 3 weeks ago. So far, no spider has come back in , although it's the time of year they usually come in. Maybe it's working......the dog don't mind it either. No biting spiders in the UK here , the sight of them just makes me feel unwell...