Willy1, I stay the heck away from anything that puts heat on a raw hide. You're just asking for trouble doing that. In time, it will get you in the butt.
I wash mine the old fashioned way - in a large tub of water with detergent/ shampoo - then rinse in clean water. Most of the time, I just hook two fingers thru the eye holes and swing them around to get a lot of the water out of them, then pull them onto stretchers where I give them the once over with a leaf blower. Mine is supposed to create a 200 mph wind and it blows the water right the heck out of them. Once the bulk is gone, I flip them flesh side out, flesh, stretch on the stretcher until "dry" then flip fur side out. Back comb them against the grain with a fur brush and leave alone for a day. Next day, hit 'em with the leaf blower again and "POOF!", they fluff up like cotton balls. Just my way of doing it FWIW, and the wife doesn't mind me using my leaf blower at all.