DIAGNOSIS Dust and debris are caught in the polyester fabric grille. The grille is not removable on the TV Speaker model, so you must clean it in place.
FIX Use a soft, dry brush like a clean paintbrush or a soft-bristled detailing brush. Gently brush the grille in one direction to lift and remove loose dust. Follow with the low-power suction of a vacuum cleaner hose, holding the nozzle slightly away from the fabric to pull dust out.
IF THAT DIDN'T WORK For smudges or spots, use a slightly damp (not wet) microfiber cloth. Dab gently—do not rub or use circular motions, as this can grind dirt in. Never use solvents, sprays, or compressed air directly on the grille.
HEADS UP The driver cones behind the grille are delicate. Never poke anything through the grille holes or apply pressure. Water or liquid cleaners can stain the fabric and damage the electronics behind it.