CLEANING drivers of dust????

Hello, I own a pair of Avalon Radian HC's with optional open front grills.....as a result the drivers are always dusty...I've written to Avalon and was told that using "Freemans" furniture cream is the way to clean them...Well needless to say alot of friends and dealers have had an opposite reaction, saying," don't do it!".
Any "clean" freaks out there have any suggestions?
I've used the feather duster and a clean soft cloth already.
Thanks..
E-Mail me directly please at [email protected]
Joe.