Home / Forums / Melodica construction, repair and maintenance / Possible Clogged Spit Valve / Reply To: Possible Clogged Spit Valve Reply To: Possible Clogged Spit Valve June 11, 2017 at 7:22 am #8980 MarkParticipant Some notes tend to get choked out, but it usually goes away and never comes back if I hold the note for a few seconds. Don’t really know what causes it though.