i am leaving the grills on all my speakers(due to WAF), but i used to leave them off.. the best way i found to clean the woofers, was a soft, angled end paint brush.. just use soft brush strokes, and the dust comes right off.. now, i aint sure if that holds true for the aluminum drivers on the axioms, but i dont see how it would be any different. just ensure its a good quality brush with soft bristles.

bigjohn

EXCUSE ME, ARE YOU THE SINGING BUSH??