What do you use to keep high gloss speakers clean?

Tried most of the choices above. The Meguires quick detailer and Plexus seem to work the best. IMO.

+1 on the Gerlitz it's amazing stuff!

Novus is great ,  Brillianize is great too.....  when I repaired copiers I used it on the glass so the original would not stick to the glass.   My sub is black lacquer and I use a feather duster,  still looks new and it's 10 years old at least

I leave them covered when not in use, works like a charm.