I keep mine in fabric tote that have a plastic zippered lid and I put a cedar block wrapped in white muslin in each one. That makes them smell nice. I take them out annually and refold them so the crease lines change. I don't do anything else with them unless they get used. I don't put them in the dryer and dare not take them outside to air. Can't even take my laundry outside to dry because of all the birds and what they like to drop on laundry (especially in mulberry season!)