I tried Marshall no-odor maybe 18 months ago, and they started to drink less water so I stopped. It is very dangerous if it makes the rats drink less water so be very careful (even drinking 5% less water would be very bad), plus not sure some of the ingredients aren't downright unhealthy or even toxic. If you use it, it is very important that you change the water daily. If you use fleece as liners it is normal that your cage smell bad. Try Aspen instead.