When my other half was still homeless he was fortunate to be donated a very good sleeping bag- good for extremely low temperatures and could squeeze 2 people in if you didn't mind a forced cuddle all night. We still have it and don't want it to go to waste, but it got a fair bit, shall we say, grubby, while he was on the streets. Can anyone recommend how to get it cleaned? I don't want to risk matting up the padding inside.