I recently hosted a group who left our cottage in a pretty bad state. They had also removed the top of the carbon monoxide detector, burnt oil in 2 frypans, left utensils on the hot frypans to melt and the place smelled of burnt oil. I'd like to report them so other hosts don't have to deal with their fallout but I don't know how. Can anyone help? I don't want any compensation, i just think Airbnb should be aware. Thanks Adriana