I am generally a slattern, but I think I have surpassed even my usual low standards here. I've never had my duvet cleaned, and it is definitely more than 10 years old (maybe older... DH thinks we bought a new one when the DC were small. I'm not so sure.)
Obviously, I change the cover regularly - I'm not that minging!
I guess I should think about having it cleaned or getting a new one.
I'm prepared for an onslaught of posters who get their duvets cleaned annually!