Hi have a problem with the odour coming from my Bp tub. I use paper towels as bedding , and my bp keeps turning the water bowl over . So I have been changing the paper towels everyday as a result. is there any bedding substrate which is good ? that doesnt smell alot even if wet. and the overall cleanliness of the tub. i have already changed to using a ceramic cup cover as a water bowl . so its fairly flat and he can't turn it over .