Home / Forums / Melodica construction, repair and maintenance / My Hohner HM 36 Issues.. / Reply To: My Hohner HM 36 Issues.. Reply To: My Hohner HM 36 Issues.. November 8, 2014 at 10:33 pm #3406 Alan BrintonParticipant Here I was rummaging around the kitchen. I just found a cap that fits pretty well. It’s from a tube of Costco Kirkland brand hydrogen cortizone. Brilliant!