I recently acquired a used Piano 36 on eBay. My first impressions are very favorable and it’s in very good condition, except that the high B is squeezed between A and C, as a result of which the B sticks when depressed. My more immediate problem, however, is that with all screws removed the melodica will not come apart. I’m wary about trying to pry it off. This is the Piano 36 with the white strap and gold strap trim. Any advice on this?