Hi, We have three fantastic rats in the living room. However, over this festive season where we have lots of visitors. The rats are really bugging my partner with their mess. We are currently using carefresh substrate, but it goes everywhere! It spreads across the entire loving room and we are having to hoover/ sweep at least once a day (two most of the time). Wr have tried different papers (that are safe) and they either chew them or pull them into the houses. The sane goes for fleece liners. Anyone got any suggestions. My partner would greatly appreciate it as it is driving him insane as he doesn't like mess .