Strange 'fishy' smell
Hello all - My parents are having an issue with a somewhat fishy odor that comes & goes in one area of the house. When present it's noticeble when you come up the stairs into the hallway. They can't seem to pin point the source of it or identify any factors that may be contributing to it (time of day, heat, mold, dead animals).
I've seen some information indicating that it could be "sewer gas" coming in from one of the faucets that isn't used on the double sink in the bathroom, but wouldn't that have more of a "sewer" odor?
They're about at their wits end with it, especially since they're attempting to sell the house and prospective buyers have noted that they've encountered the smell. I beleive that this is something that has only come about in the last year or so. They've lived in the house for 10 years & it was never a problem before now. They have not painted in that area recently or had any other major work done. They did get the water heater replaced a few years ago, but I can't recall if the smell began before or after that, I'll have to ask.
Any ideas or suggestions? They really don't want to have someone start knocking holes in the wall to figure out where it's coming from, but it's starting to look like they might not have a choice. Is there such a thing as a "Smell Detective?" (Hehe!)
I really appreciate any feedback you guys have to offer! Thank you!!!