I wash my down sleeping bags at the local laundromat (since we only have a top loader at home), usually starting the machine and then heading out for some shopping. I then stop back in, put it in a dryer on light heat, along with some tennis balls to break up the down, and then head back shopping again. I'd rather pull my own teeth than sit in a laundromat for any time. Sometimes the bag still won't be dry so I'll head home and finish the drying process there with the tennis balls, which I keep just for when I dry down products (jackets/parkas, booties, sleeping bags, comforters). I have washed them with Woolite but prefer Nikwax. I found two sleeping bags on the dump that someone had thrown away and they needed a good cleaning, so I looked up and experimented with how to clean them at home, starting with washing them by hand, which didn't get them as clean as I'd like. Nothing wrong with them other than they needed a cleaning and they are my favorite bags. The 15° is my go-to bag for winter hiking and I use it often.