speaker grills

I usually use a toothbrush to loosen the dirt and then a vacuum with a brush attachment to suck it out before it can fall into the cone.

I don't use any liquid spray on cleaners since they can go right through the grill and destroy both the speaker surround and the cone itself.
 
Open speaker grills,
Clean with diluted APC using toothbrush,
Apply dressing after drying it,
Screw back into the speakers.
 
steam would be the trick but i dont have a vapor one
 
I think ill try a booth polishing brush with a mist of apc
 
I think ill try a booth polishing brush with a mist of apc

I think that is the safest way to go. Your results should be very good.

Post some before/after pictures and a write up on your technique. That will help others that might have the same question.
 
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