like sewer gas coming up thru the cold air vent from the basement - not a darned thing can be done about it right now cuz the old man who lives in the apt below (only basement access is thru his apt) - goes to bed at 8pm and is as deaf as a brick. Sewer gas - can't see it, keep questioning if that's REALLY what it is - annoying as hell - :bigeyes:
*phew*