Home / Forums / General melodica discussion / P-37D wildly out of tune? Also: delayed key sound. / Reply To: P-37D wildly out of tune? Also: delayed key sound. Reply To: P-37D wildly out of tune? Also: delayed key sound. February 16, 2022 at 4:12 pm #14038 Alan BrintonParticipant How close to the base of the reed are you applying nail polish, Andre? Too close maybe? Also, is there a problem removing polish if you have too much?