BMac

I have some white Klipsh RS-3 surround speakers and they have gotton rather dirty. Does anyone know of a proper cleaner to use or process to go by to clean the white mesh speaker covers? Or is it even possible to replace the white speaker covers?

Does anyone know where I can find wall/ceiling brackets that will fit the RS-3's? I would like to find brackets that are sturdy enough to hold the RS-3's. Any suggestions/websites I can find them would be appreciated.