I had a guest (7pax) for one night stay at my family house, she called me at 1:30 am saying that the smoke alarm in the kitchen went off by itself and there was no fire. Also she said that could not reach the alarm to reset it because the ceiling was too high ( 5.2 Meters = 17 foot). So, i told her that if she had the gas heaters on in the bedrooms then it must be the carbon monoxide alarm. The combined alarm (smoke & Co1) is also installed in the bedroom but did not go off, so i told her to ventilate all the house just incase. I went to see them in following morning as checking out time was at 8:30 am, the Lady was complaining that she was so sick, dizzy and nauseous. But when i got to the kitchen, i found out that someone was burning a frankincense in an ashtray just below the Alarm sensor. When i told her that this was the cause of the alarm, she replied " Oh ... no this was burnt this early morning".
Up until now she did not claim for refund, but i believe that she might leave me some bad review. I will not be able to see her review before i submit mine. Please advice me what to do ?