[Harp-L] cx-12 maintenance

[NiKo Ba <helloiamnikos@xxxxxxxxxxx>]

help ! 

my cx -12 has started buzzing . apparently valves seem to to be out of place but no matter my effort to put them back in the right place the problem comes up after a few days . it 's become really annoying . could you guys please let me know what is the best way to maintain a cx-12 . 
 		 	   		  
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