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 24, 2018 at 4:37 pm #9786 Alan BrintonParticipant It’s not advisable to leave your melodica out in the hot sun, Yan.