In reply to Rigid Raider:
Yes. I think there’s a lot of overthinking combined with impatience going on.
I’m fairly sure last time I washed it i left it to drip dry then gave it a good pummelling every few days to get the life back into it.
Having said that, just the hour in the tumble dryer made a huge difference.
I did my Sleeping bag in the launderette. That did take a fair few 20p pieces and a few chapters of a good book if I remember rightly.