There is one in the house we just moved into but I never use it. It smells sort of earthy.
I have put neat bleach down when we first moved in. It did stink more then. Since then I rinse it out about once a week with hot water and a good squirt of bleach, running the grinder thing or whatever it is.
The smell remains however.
Also I spilt a glass of water on the living room carpet and that has absolutely ponged over the last few days. Like sick! How do I get rid of that? I am loathe to wet it incase it smells worse.