Gonzo Wonder Sponge

I usually use a dry paintbrush to dust my lampshades, but I found something that worked even better. I had a shade that, even after dusting, was still grimy. I thought I was going to have to replace it, but I tried a sponge called Gonzo Wonder Sponge that is to be used dry only, not wet. My lampshade, which is fabric, looks brand new! I bought mine at Bed Bath and Beyond for under $5.