Hi Bradley, Taking the assumption that the reservation is still ongoing: you could kindly reach out to the guest to remind them of the house rules. Otherwise just wait for them to checkout, notify your housekeeping that you believe they were smoking and to be alert to any physical evidence (tips, ash) and make sure they grab photos. Then file a resolutions claim with the minute detector proof and any photos. You should have no issues getting Airbnb to pay you out as long as you have the proof. I do not use minute but have had multiple smoking claims approved with simple photos of ash, tips, papers, or even left over cannabis. Hope this helps! Eric