Whenever you come home from a hike, air the bag out. You can simply place the bag on the top of your door or hang it over the back of a couch. Never store it away until it’s fully dry. Loosely stuff your sleeping bag into a large pillowcase, mesh bag, or cloth sack. Using smaller stuff sacks is not recommended - long-term compression is guaranteed to affect the bag’s fluffiness. Store the bag in a large closet or a similar well-ventilated area.