In the event that a note in your harmonica has become unplayable, it's very likely that the reed has become misaligned and needs to be restored to its proper position.
Within this guide, you will be able to take apart your harmonica, clean the reeds, and finally warp the troubled reed back in place.
In addition to the listed tools, certain items will also be required such as a bowl to hold water and vinegar, a small soft brush, and a flat implement such as a knife.
Using the Phillips head screwdriver, remove the 11 mm Phillips #1 screws in the center of the Harmonica holding the reed plates in place and set these aside.
Separate the reed plates from the comb and set the comb aside.
Note the orientation of the reeds and which direction they face as you you set them aside. Referencing how they align with the comb will also be helpful when putting everything back together.
Remove the reed plates from the solution and use a soft brush to clear away debris.
When brushing reeds, it is important to brush in an up and down motion following the direction of the reeds. Failing to do so could cause unnecessary damage to the reeds.