Well, I learnt something last night, and thought I would share...
I did my usual 70 degree, 3 hour hose and filters wash, and popped a DC03 filter in just to see what happened...
It melted a bit
The 'washable' part died too
All the filter media turned to cotton wool
And made a hell of a mess when I shook the towels off I put in with it
Was fun to vacuum up though, still need to finish it off, just got the worse up with the miele on minimum power at 11.20pm last night...