After time, speakers get covered with dust. To keep them dust-free and working properly, here’s how to clean them safely: clean the cabinets and any removable metal or plastic grilles with a soft, damp cloth. For fabric carefully vacuum both sides of the grilles on LOW ( a Dustbuster-type vacuum works best). If they are really dirty and can be removed, rinse them in warm water and let air-dry. For non-removable grilles carefully wipe with a damp cloth being very careful not to get any water on the drivers inside! DO NOT clean the drivers unless they are covered in dust. If they are, use a clean, DRY paint brush (preferably a new one) and gently sweep away the dust! Now you can hear your favorite music without raising the volume!