In all of our stays with hosts over the years (about 75) we have had varying levels of cleanliness. We don't expect every place to be spotless, but until our last trip we had only one other time when we felt really uncomfortable staying. And that time, we didn't stay. Luckily the host was not at home when we arrived but had left the door open for us. Upon seeing the place, we left a nice note saying we decided to ride further, then went and found a motel. But on our latest trip we couldn't easily leave. The place was so filthy, really disgusting. I left positive feedback because I felt badly leaving negative. The host was very nice and helpful. The host has had well over 100 guests, with over 70 positive reviews, some of them glowing. Not one of those mentioned the filth, as I didn't. What is the best way to leave feedback to reflect the filth, so that future guests can know about this and decide if they want to put up with it? I realize I could have said that it was not the tidiest place, or some other nicety. But that wouldn't be the truth either and wouldn't help guests trying to decide among hosts.