It's obviously rotting in the water holder it's sitting in. Or the water has gone rancid. But no way to get it out as there are too many branches in the way. I thought I could suction it out with a (rather appropriate) turkey baster but couldn't angle it right.
The most infuriating thing is no other bugger in the house can smell it (they are all men and nose blind). I am NOT imagining it, I just have had an annoyingly sensitive sense of smell ever since having the kids (who are now teens). DH is moaning cos I've lit a Christmas candle to mask it. I told him "well, it'll be ok cos apparently none of you should be able to smell it!"
This happens every year after it's been up a couple of weeks. Am I doing something wrong? Why the stench?