I am concerned about a friend who seems to zone out and almost fall asleep during a conversation. I discovered aluminum foil with a black sooty residue hidden in bathroom trash. There was an unusual odor in the room also. Can this foil be tested or does it need to be done?
Thanks for asking in Chat Doctor forum In short: Any incomplete combustion can release Carbon monoxide(CO) which can cause unconsciousness and even death. Explanation: Incomplete combustion of any material will release carbon monoxide to the atmosphere and if Carbon monoxide inhales can cause incapacitation/unconsciousness and eve death.  So, have complete ventilation in your bathroom and avoid any short circuits/burning inside the room. Hope this will help you. Please let me know.