Cellular shades can be cleaned by using a dry cloth, feather duster, vacuum with brush attachment, compressed air, or a hair dryer at a cool setting to remove dust and debris. For spot cleaning, use a soft cloth or sponge moistened with lukewarm water. Add mild detergent if needed. Blot gently to avoid creasing the shade, and let dry in the lowered position. For significant residue build up, professional ultrasonic cleaning may be used. Do not scrub fabric or use harsh chemicals. Never immerse the shade in liquid.