Remove the orthotics from shoes at night to allow perspiration and moisture to evaporate. The orthotics should be cleaned periodically by wiping them down with a damp cloth. If the orthotics have a soft top-cover, sprinkle them with baking soda or talcum powder to help absorb any odor they may collect.
DO NOT immerse the orthotics in water (e.g. sink, washing machine).
DO NOT subject them to heat sources (e.g. heater, fireplace).