I've always had great results by first removing the dust with a Swiffer Duster, then using a microfiber cloth and Mothers quick detail spray. I would spray a little on the speaker, then some on the cloth. Then, gently wipe the speaker to remove any finger prints, turning the cloth over to the dry side for a final buff. I have yet to have any issues using this method on any of my speakers or subs.
How To Clean Piano Black Speaker Finish?
What do you use to clean your speakers Piano black finish? I am using a slightly damp microfiber cloth. So far, in 2 years, no scratches. Is there an easier way to keep them clean? I have used a very clean wool duster a couple of times but it doesn't help fingerprints like when I move them. Anyone?