Home / Forums / Melodica construction, repair and maintenance / How Hard to Blow into Melodica to Clean? / Reply To: How Hard to Blow into Melodica to Clean? Reply To: How Hard to Blow into Melodica to Clean? December 26, 2015 at 12:27 pm #6615 DarenKeymaster Hello Hopeless! Merry Christmas, what a thoughtful girlfriend you have 🙂 Yes, you can blow as hard as you like with the spit valve open.