I was given a bottle of No Mo “O” to try. I do not have any pets or urine problems so I was not sure what I would try it on. I put the bottle in my motor home thinking, maybe one day I would try it on the carpet, if needed. We were on a road trip and I realized that the odor from the toilet storage tank was really strong. I grabbed the No Mo “O” and figured what the heck. I poured it in the toilet and almost immediately the odor was completely gone!!