Hi All
I have a very unusual problem - my study room has developed an unusual smell, a combo of musk, sweet/rotten food and whatever else. The room only contains a PC, stereo and a cd rack. I clean it very regularly, I even have a house keeper and I make it a rule never to eat/drink in this area. It has a wooden floor, no carpets and a window overlooking the garden. I smelled every item in the room and cannot identify the cause of it. The smell is constant and if the window / door is shut, the smell intensifies. The room is close to the bathroom, but the drainage/toilet is some distance away and it actually smells impecably, like the rest of the house. The smell reminds me of an occasion years ago when I forgot a jaffa cake empty box in my car and it started stinking in my boot and this is same smell, sweet, musky yet sickly, but the major difference is there is no food in the room. I cleaned the room thoroughly a few times and used a few leading brand polishers/floor/surface cleaners, including anti bacterial 99.9% killers, oudour eliminators of various descriptions, but this has been going on for two weeks and is doing my head in. Please help, anyone.

Have you looked outside the home to see if there is a vent under the window? Also do you know which way your plumbing runs under your house?

There is no vents in / under the window. Plumbing runs nowhere near the study room.

Have you checked under the room? Is there a basement under it or is there a crawl space? Possibly an animal has died and the smell is generating from there?

Stringer

The room is upstairs, below is my lounge. I can't see how a dead animal would enter tight space / my ceiling... There is now obvious holes in the wall. Never the less, I'd like to explore that possibility further. How can I do so without drilling through or removing my wooden floor?

Eureka! I found it. It was a little bottle of lemon oil/cd polish, it had a pump dispenser and the seal on it broke.

Great resolution!! Doesn't that feel good?