At first, I thought it was coming from the ensuite bathroom but after keeping both doors to the bedroom closed for just a few minutes it was only in the bedroom.
It is a smell that I associate with cat hormones (we have never had them) and stays in the back of my nose for ages after I have experienced it. My husband (who sleeps in this room) is unconcerned by it and thinks it smells of wood polish. I could not spend time with this smell because it stays in my head!
It does not seem to be coming from any cupboards or drawers and I experience it as strongest close to the bathroom door, though once through the door and with it closed behind, the bathroom smells sweet. I'm not sure if acrid is the right description. But it is a very definite smell that I don't associate with drains or with dead rats (which I have experienced).
Any help much appreciated. What I dread is that it turns up in another room.