Sorry to hear that grieg, there a pain, i dont have problems with them, but knew a guy who did, and he used this, and he said it was great, hope it helps.
http://cgi.ebay.co.uk/RAT-MICE-RODENT-INSECT-GLUE-SUPER-STRONG-NON-POISON_W0QQitemZ150355442856QQcmdZViewItemQQptZUK_Home_Garden_Garden_Plants_Weed_Pest_Control_CV?hash=item2301e1fca8&_trksid=p3286.c0.m14