I agree Jean-Michel and a lot of other comments. I too a fantastic rating from all of my guest except one. I did everything I could to assist this person and had numerous text messages and Airbnb messages to collaborate my side of the story. The guest left my house in a mess the dog which I had no idea was even their scratched doors, ripped a quilt cover, ripped flyscreens, there was food and dirty dishes and these people only stayed on night, I was charged by the cleaner and in the end the booking left me out of pocket over $200. I wore this and we fixed the damaged caused. But I was very upset when they review me veryly badly. I contacted Airbnb support to request to have the review removed and received the same response that the policy of Airbnb is not remove these reviews as it gives an overall view of a guests experience. The support person at Airbnb agreed that the guest had not read the information provided and agreed that I was a great host based on all my other reviews and suggested I respond to the review. I wrote what I believe to be a very well worded and honest response to the guest.
What really upset me though was the generic message I then received from Airbnb stating that I needed to improve my guest reviews or risk being removed from the site. As our property had only been listed for less than 12 months and at that point I had about 7 reviews the 2 start rating brought my results down. I am now working my way back and am currently at 4.5 %.
Since that review I now make sure that guests are given as much information as is possible. I email them a number of times before they visit and I will no longer take a booking with less than 24 hours notice. I am constantly reviewing my listing to make sure it is accurate and up to date.
But I know no matter how much information we give the guests we are still going to encounter an unhappy visitor. 99% of my guests are lovely, respectively, honest people who take care of our holiday home. I am more careful with the guests that I accept and this seems to be working for me.