I need to clean my winter double duvet. It is synthetic fibre (not sure what it is) and way too big to fit in my washing machine. It is quite a high tog. Should I get it dry cleaned, or take to a launderette and wash it with water? (If I can locate a launderette - they seem to be a dying breed these days).
It isn't horribly dirty, but has been slept on by the dog (whenever he managed to sneak onto it) and has been on the floor of my son's under-the-bed den for a few weeks. It also has the odd stain, although not any rancid smells or anything.
Any advice?