I have had my pair of ML Clarity for about 18 months, and I can’t see any dust on the panels to clean. I have tried a vacuum, but I can’t see that it is doing anything. I have even used a flashlight looking through the panels to try and find dust, but I can’t. They still sound great, so I am not complaining. Could the Low Voltage Panels be the cause of this? Do they not attract as much dust?
I have never seen visible dust on the panels, but my wife dusts the house all the time, so I know it's in the air. I vacuum my panels every 6 weeks or so, or when I remember and can unplug them for 24 hours. I'm not sure if it's in my head, but it seems as though they sound a little cleaner and brighter after vacuuming. I figure, even if it is in my head, it's free, so why not?
More recently, I had was getting a airy buzzing in one of the panels that was not fixed by vacuuming. Contacted ML and they sent instructions for removing the panel and washing. The buzzing went away before I had a chance to remove the panels, so I haven't done it. It doesn't look very difficult, but I wouldn't do it unless the panels are dirty enough that they start buzzing, or have a few years on them.
One other thing ML mentioned is to never use any kind of spray cleaner around your speakers because it will get on the panels.