As far as my amp,   When I use it, it leaves a kind of dark tarnish on my brass.   The coils on the inside feel a little residue/oily.   Is there a way to clean it?   Or does it need cleaning once in a while?
Does anybody know or own a new revised amp mate? I’m wondering how well they work.
thanks.
				
			Does anybody know or own a new revised amp mate? I’m wondering how well they work.
thanks.
 
	








 
 
		 
 
		 
 
		 
 
		
