craft, thats horrible! Girls are evil!!! I have actually got one of the Primrose repellers and its great.. (it seems the only people that criticise stuff like this are the ones that haven't actually tried them!) I used to have at least 10 or 11 big spiders in my house and since I've been using my repeller I've seen 2 at most (tiny ones) - and it's meant to be spider season in September!! For the spiders that still make it in I bought a spider catcher , you can catch the spider at arms length (I wish I had the guts to do the cup and paper trick) and take it safely outside. It's been a lifesaver!
http://www.primrose-london.co.uk/spider-catcher-p-2294.html?cPath=301