Ovature: I sold my SL3 last year and I also bought them in 2000, the guy who bought them loves them and hasn't had any problems with them. A dehumidifer works wonders depending where you live and I have a whole house Air Cleaner which keeps dust to a minimum. I agree with Joey a good vacum with a light dust cloth and or some canned air does wonders. Also you might see if ML has Cloth covers for your SL3s, it seems they are shipping new speakers with these. My new Vista's came with Cloth covers, which was very nice. I wouldn't try the washing of the panels though, mixed results so far.