BPSnakelady yes that's exactly what I'm thinking
probably it's this scenting territory for feeling more comfortable...what i don't understand is that it doesn't fit to the whole idea of cleaning/changing tubs for problem feeders. if the tub represents a new snake-free hide, then the snake should wait for the rodent without producing odours that could warn the rodent, then eat it and poo/pee before searching for another hide. Does the idea and my english make any sense?
i'm sorry but i don't change it immediately...i recently changed to corrugated paper which absorbs a lot and dries in a couple of hours. if they poop i will.