Further Note on Using a Toothbrush
The reeds and reed plates of this Melodion needed serious cleaning. As indicated above, I used a toothbrush with toothpaste and then baking soda. This cleaned very well. HOWEVER: It pushed the reeds down, closing the gaps on the bottom 6 reeds so that I am now having to open those gaps to get the notes to play. Consequently, I advise against using a toothbrush or other stiff brush on the reeds. The best alternative may be to remove the reed plates and soak them in Polident or a comparable product for cleaning dentures. Or in a 1-5 (or so) mixture of bleach and water for an hour or two.