(Please) What would be the best way to clean Speaker cloth?

a lint roller works great  - dont push it down hard so not to crack it 

Remove the grille from the speaker. Be careful doing this as you do not want to damage the grille. Clean the grille of your speakers. The grille on your speakers can get dusty. If they are not catching dust they are not working properly. If the grille is a fabric one you can vacuum it to get rid of the dust. If the grille is soiled or stained gently rinse with warm water and lay them out to dry before putting them back on. from: http://www.ehow.com I personally have used the brush attachment on the vac and lightly gone over the cloth to get it clean

The grille on your speakers can get dusty. If they are not catching dust they are not working properly. If the grille is a fabric one you can vacuum it to get rid of the dust. If the grille is soiled or stained gently rinse with warm water and lay them out to dry before putting them back on. If the grill is metal or plastic the best way to clean them is by using a cloth that is either dry or a little damp.
Clean the driver in the speaker. Dust can accumulate in the drivers. When removing the dust use a soft bristle paintbrush. If your drivers have become very dusty because you do not have grilles on your speakers you may want to begin to use them.
You have to be careful when you clean your speakers because some of the parts are delicate and you do not want to damage your speakers. You should clean your speakers periodically so they will give you the best sound possible.
If the grille is a fabric one you can vacuum it to get rid of the dust. I would try the upholstery brush on a vacuum cleaner. If the grille is soiled or stained gently rinse with warm water and lay them out to dry before putting them back on. You can use one of the "Dry Clean" aerosols available at Auto Stores, like Blue Coral Dri-Clean.