To keep your cellular shades looking pristine and new, regularly vacuum them with a brush attachment. Swipe across in horizontal strokes following the pleats.
If you notice dust inside the cellular honeycombs - use a blow dryer (in low, cool setting) to blow it out. Do not use warm or hot air. You can also use a can of compressed air.
If you need to remove stains, you may spot clean your shades, but be gentle and do so infrequently. Use water or mild soap with a damp cloth. Do not use strong liquid detergent or spot removers. Carefully wipe or blot the effected area. Blot dry with another clean cloth. Do not scrub the fabric or submerge the shade in water.