Home / Forums / Melodica construction, repair and maintenance / Yamaha P37D, muffled sounds due to clogged spit / Reply To: Yamaha P37D, muffled sounds due to clogged spit Reply To: Yamaha P37D, muffled sounds due to clogged spit March 25, 2018 at 1:32 am #9787 YanParticipant I understand that the heat would damage the reeds and had left the inner section indoor. What i dried under the sun was the only exterior maroon/chocolate case and the reeds cover.