One of the factors/examples that can negatively affect online reviews from users of a vacation rental property is the smell of tobacco, even though the property is clearly marked as a non-smoking property. Previous users or others may have broken the no-smoking rule and smoked.
Or, the user may have smoked on the balcony or porch attached to the building and left the windows and doors open, allowing the tobacco smell to enter the room. There may be other reasons for the cigarette smell.
One of the best ways to deal with these issues is to clearly state them in the rules of use for users, but in terms of actual operation and management, it will be necessary to eliminate the odor during the cleaning process after each user leaves.