This really boils my piss, someone at my place was leaving Trap 2 like a kin murder scene, so I put my Sherlock head on in work and basically followed everyone into the bog (admittedly like some kind of wrongun) I narrowed it down to 2 dirty animals and after another week I had the culprit!! I gotta bog brush and stuck it in a wine gift bag, with a note 'you've been identified as the phantom toilet pebble dasher, the toilet cleaning fairy has resigned, so clean up ya Shyte!!' This thankfully worked, however I'm not afraid to go to such lengths again in my quest for clean sanitation for all !!